Extortion group FulcrumSec claims they stole 86GB of Manchester Airports Group data after finding API credentials exposed in client-side JavaScript. Manchester Airports Group (MAG) disclosed a data breach on August 27 affecting customers of Manchester, London Stansted, and East Midlands airports. Two days later, BleepingComputer reports the extortion group FulcrumSec claimed responsibility, saying it stole roughly 86GB of data, considerably more detailed than what MAG’s original disclosure suggested. MAG’s own statement describes a relatively limited set of exposed data. It says the breach affected car park, lounge, Fast Track bookings, and airport WiFi registrations, exposing email addresses, phone numbers, vehicle registrations, and postcodes. MAG disclosed that the data breach impacted 8.7 million customers, however, the company says most of those customers had only their email addresses exposed. FulcrumSec tells a different story. The group shared samples with BleepingComputer that included a 21.5GB export of Manchester customer data, with personal identifiers, historical booking details, and marketing information. BleepingComputer checked one record against a real traveler’s purchase history and found matching Fast Track bookings, arrival times, terminal information, and payment amounts. The alleged way into the system is particularly concerning. FulcrumSec says it found airport-specific Iterable API credentials inside client-side JavaScript. That code runs in users’ browsers, so anyone inspecting the website with developer tools could potentially see those credentials. “The group claims it obtained access using airport-specific Iterable API credentials exposed in client-side JavaScript and that the stolen material includes nearly 200,000 records related to upcoming travel during the remainder of 2026.” states the report. These records allegedly contain dates, times and booking information linked to personally identifiable information. FulcrumSec says it intends to publish the stolen data and a technical account of the intrusion. If the claim is accurate, attackers did not need a highly sophisticated technique. They simply found sensitive API credentials exposed in code that the website sent directly to customers’ browsers.” The most concerning specific claim is nearly 200,000 records tied to upcoming travel through the rest of 2026, complete with dates, times, and booking details linked to identifiable individuals. BleepingComputer couldn’t independently verify that number or the full scope of what was actually taken, and MAG declined to directly address FulcrumSec’s specific claims when asked, instead pointing to its existing statement that affected customers with upcoming bookings had already been contacted. MAG is confident that we have taken effective measures to protect our customers and we have contacted all those affected, a spokesperson said, without engaging with the 86GB figure or the exposed-credentials claim directly. FulcrumSec plans to publish the stolen data but may redact upcoming travel records because of the risk of real-world harm. UK postcodes can identify very small groups of addresses, and combined with vehicle registrations, parking dates and booking details, the data could enable highly convincing phishing messages targeting people with upcoming trips. UK postcodes make this exposure sharper than the equivalent breach might be in the US. Unlike American ZIP codes covering broad delivery areas, a full UK postcode typically identifies a small cluster of neighboring addresses, sometimes a single property, according to the Office for National Statistics. Combined with vehicle registrations, parking dates, and specific booking references, that’s more than enough raw material for a phishing message referencing a real upcoming trip that would be very hard to distinguish from a genuine MAG communication. Security researchers commenting on the broader incident have flagged a supply-chain angle worth watching. Airport operations increasingly run through third-party platforms for booking, parking, and loyalty services rather than systems the airport itself directly controls, and Iterable, the marketing platform whose API credentials FulcrumSec claims to have abused, is exactly that kind of outsourced dependency. This also isn’t aviation’s first bad year: a September 2025 ransomware attack on Collins Aerospace‘s check-in software had already grounded systems at Heathrow, Brussels, and Berlin, meaning UK and European aviation infrastructure has now taken two significant hits inside twelve months. MAG says no payment card or banking data was exposed, however, travelers who recently booked parking, lounge access or Fast Track should assume more travel data may be exposed and treat messages citing real booking details with caution. Follow me on Twitter: @securityaffairs and Facebook and Mastodon Pierluigi Paganini (SecurityAffairs – hacking, Manchester Airports Group (MAG))
The Manchester Airports Group data breach has been claimed by extortion group FulcrumSec, which told BleepingComputer that it stole approximately 86 GB of data. Samples reviewed by BleepingComputer contained information consistent with MAG's disclosure while indicating that the breach exposed considerably more detailed customer, booking, and travel information than initially revealed. Manchester Airports Group (MAG), the United Kingdom's largest airport operator, disclosed on August 27 that an unauthorized third party had stolen customer data related to Manchester, London Stansted, and East Midlands airports. The company said the affected information came from car park, lounge, and Fast Track bookings and in-airport Wi-Fi registrations. In emails to BleepingComputer, FulcrumSec claimed responsibility for the attack and shared samples of the allegedly stolen data as evidence.
Anthropic is warning some Claude users that infostealer malware on their PCs has stolen active Claude login sessions, allowing attackers to access accounts and consume their usage. The company is signing affected users out of Claude, removing saved payment methods, and refunding charges it identifies as unauthorized. "We have recently become aware of a bad actor that is using common infostealer malware to steal Claude login sessions from people's computers, then using those login sessions to access Claude accounts and consume their usage," Anthropic said in an email sent to an affected user, who shared it on Reddit. "If your usage limits looked like they refilled and then drained while you weren't using Claude, this was likely the cause," Anthropic warned. It is also worth noting that infostealers can copy an already authenticated browser session, which means the attacker may not need to go through the normal password and 2FA login process again.
Multiple extensions for Google Chrome and Microsoft Edge delivered a malware framework that deployed modules to steal cryptocurrency, sensitive data, and browser history, and to inject ClickFix lures. Researchers say all 16 malicious modules uncovered in the campaign serve distinct purposes and are designed to be "highly extensible." The operation was uncovered by application security company Socket, and the investigation indicates that it may have been active since early 2024. Socket says that when initially published on the Chrome Web Store, many of the extensions provided the advertised functionality and contained no malware. According to the researchers, five of the extensions were acquired from their original creators and injected with malware via updates delivered automatically. One example is the "Enable Right Click & Copy — Smart Unlock + OCR" extension, the only one in the campaign available for both Chrome and Edge, which had a Chrome user base of at least 70,000 when it turned malicious. The number of installs on Edge was 10,000 at the time.
Security Affairs Malware newsletter includes a collection of the best articles and research on malware in the international landscape Malware Newsletter Operation QUICSILVER: China-Nexus Actor Targets Myanmar Diplomats via VHD-Delivered Go Backdoor FTP Banners: The New Dead Drop Resolver Delivering Novel RATs The State of AI-Enabled Malware August 2026: From Brand Abuse to Agentic Execution 19 Chrome and Edge Extensions Deliver a Wallet Drainer and Credential-Stealing Payloads SLEEPWALKER: A Passive Backdoor With Its Own Command Language Tortoiseshell: New Toolset and Operational Infrastructure Exposed Dark Caracal Reloaded: New Malware, Same Hunting Grounds Cambodia-focused cluster uses multistage infection chain with localized lures BlueDelta Targets Defense and Diplomacy with HOOKEDGE XAI-Guided Graph-Based Feature Engineering and Heterogeneous Ensemble Learning for Android Malware Detection BotScan: An adaptive active probing approach for identifying live IoT Botnet C2 servers at scale EGAMA-RC: Risk-Calibrated Evidence-Gated Adaptive Malware Analysis for Robust and Interpretable Memory-Forensic Triage Survival of~the~Stealthiest: Evolving Low-Entropy Ransomware via~Genetic Algorithms Follow me on Twitter: @securityaffairs and Facebook and Mastodon Pierluigi Paganini (SecurityAffairs – hacking, newsletter)
PaperCut servers are under active attack, while 47% of tracked installations still run unpatched versions vulnerable to remote code execution. PaperCut, the print management software running in schools, hospitals, and offices worldwide, confirmed on August 27 that a pre-authentication remote code execution flaw is being actively exploited against real customers. Researchers at Huntress found evidence of exploitation in two customer environments, and the security firm went further, reproducing the entire attack chain from scratch against a clean, unpatched install. “Observed activity focused on system discovery. We have not observed secondary malware, further command-and-control traffic, or additional persistence or post-exploitation from the recovered payload.” reads the report published by Hutress. “Huntress reproduced a full pre-authentication RCE chain against a vanilla PaperCut NG 25.0.11.75758 server. We have reached out to PaperCut to coordinate with them on continued vulnerability analysis.” The vulnerability starts with a simple authorization mistake in PaperCut. An attacker can send a specially crafted request that makes the server display one page while actually running an action from another page. PaperCut checks the permissions for the page it displays instead of the action it actually performs. This flaw, tracked as CVE-2026-81578, can let an attacker change the server’s configuration without logging in. That access can then be combined with a second flaw, CVE-2026-82078. The issue in PaperCut’s database utilities can load unsafe Java classes, allowing the attacker to run arbitrary Java code on the server. The real-world attacks Huntress observed were almost quaint compared to the severity of the bug itself. One incident lasted under two minutes total, with the attacker running nothing more aggressive than whoami and ver, basic commands to identify the compromised account and Windows version. A second incident added tasklist to the mix, checking what processes were running, but neither case showed evidence of deeper persistence, secondary malware, or follow-up command-and-control traffic. The activities observed by Huntress read like reconnaissance rather than a finished operation, the kind of activity that usually precedes something worse. The forensic trail attackers left behind is genuinely useful for defenders, and it’s worth understanding exactly what it looks like. Investigators found a malicious Java class file dropped directly into PaperCut’s own installation directory, capable of running commands, writing results to a temporary file, and then deleting both the output and the server’s own log file to cover its tracks. One artifact survived that cleanup regardless: a Derby database log entry reading memory:...\pwn, an oddly named database directory that PaperCut’s own investigation guidance now flags as a high-confidence indicator of compromise. “After exploitation, the .class file deletes its own Udydn.out file, as well as the server’s server.log file. The server.log file recorded the execution of this code in a log line that contains the string DB URL: jdbc:derby:memory:pwn that immediately followed the large encoded data blob’s appearance in the log.” continues the report. “We observed /data/internal/derby.log was not deleted, and it contains one insightful breadcrumb” PaperCut’s patching process is more complicated than simply installing an update. The company released an emergency patch first, then issued another update less than 24 hours later after additional testing. Fixes for version 24 were still being developed when the report was published. The timing is important because the second confirmed attack targeted a server running version 24, before the fix for that version was available. Huntress successfully recreated the exploit chain in a test environment. From a remote system, the researchers were able to trigger code execution without authentication. The attack caused PaperCut’s pc-app.exe Application Server to launch charmap.exe with SYSTEM privileges, confirming that the vulnerability can lead to code execution at the highest Windows privilege level. The bigger concern involves older versions. Huntress found that about 47% of the roughly 2,500 PaperCut installations it tracks still run version 23 or earlier, and there is currently no patch for those versions. Huntress is working with PaperCut to analyze the vulnerability and coordinate the response. If your organization runs one of these older versions, the safest option for now is to remove the PaperCut Application Server from the public internet. Restrict access through a VPN or a trusted internal network until a proper fix becomes available. If your PaperCut server has been publicly accessible recently, installing the patch should not be the end of your response. It should be the start of an investigation. Before restarting the server, save its logs and configuration files so you don’t lose important evidence. Check whether pc-app.exe has launched a command shell or tools such as tasklist, and look for unexpected .class files in the server’s lib directory. Even a short two-minute reconnaissance attempt could be an early sign of a more serious attack. Follow me on Twitter: @securityaffairs and Facebook and Mastodon Pierluigi Paganini (SecurityAffairs – hacking, Philippine nuclear and naval targets)
A new round of the weekly Security Affairs newsletter has arrived! Every week, the best security articles from Security Affairs are free in your email box. Enjoy a new round of the weekly SecurityAffairs newsletter, including international press. Hack One Robot, Reach the Next: Unitree G1 Security FlawsRhysida Ransomware Group Targets Berlin Government Ahead of VotePhilippine Nuclear and Naval Targets Hit by Suspected Chinese OperatorLove Electric Breach: 877,000 Driver Records Offered for $600Trump Targets Foreign Technology in New U.S. Power Grid Security OrderU.S. CISA adds ownCloud, Linux Kernel, and JFrog Artifactory flaws to its Known Exploited Vulnerabilities catalogRussian APT BlueDelta Uses HOOKEDGE to Target Defense and Diplomatic OrganizationsPaperCut Zero-Day Under Active Attack: Emergency Patch ReleasedU.S. CISA adds Red Hat, Linux Kernel, Ajax.NET Professional, Microsoft SQL Server, and Citrix NetScaler flaws to its Known Exploited Vulnerabilities catalogCyberattack on UK Airport Operator MAG Exposes Data of 8.7 Million Customers Across Three AirportsDark Caracal Deploys New Go Malware With Ethereum-Based C2 FallbackAustralian Police Charge Two Over TeamPCP Credential TheftMeta to Pay Up to $18B Over Teen Social Media UseCISA Warns Water Utilities: Find Your Exposed PLCs Before Attackers DoOpenAI banned Russian ChatGPT accounts backing covert influence operationCISA Red Team Fully Compromised Two Critical Infrastructure OrgsFBI Seizes China-Linked Hacking Platforms QScan and QTRouter Used Against Critical InfrastructureU.S. CISA adds Gitea flaw to its Known Exploited Vulnerabilities catalog88 ID Verification Breaches Show the Cost of Collecting Identity DataWhatsApp Adds Stronger Security as Passkeys Hit 1 BillionOperation Jackal: 58 Arrests Expose the Money Laundering Machine Behind Global ScamsNorway ’s Digital Government Infrastructure Hit by a new DDoS AttackWhen the Algorithm Fires You: Uber Faces €825M FineTwo CVSS 9.8 Auth Bypasses in miniOrange SAML WordPress Plugin Were Exploited Before Any Database Even Listed the Paid Editions as VulnerableU.S. CISA adds maximum-severity Oracle flaw to its Known Exploited Vulnerabilities catalogFake Minecraft Sites Are Still Spreading WeedHack After C2 TakedownCybercriminals Turn GTA VI Leaks Into Malware BaitSlovakia Warns of Cyber Risks in Road Speed CamerasTikTok Settles U.S. Child Privacy Case for $400 MillioniAuthFlow v2: The $10,000 Phishing Toolkit That Survives Your Password ResetUK Power Plant Disabled for Four Days by Iran-Linked Hackers, Concurrent with US Water AttacksZero-Click Grok Chat History Theft: Adversa AI Demonstrates Cryptographic Context Injection International Press – Newsletter Cybercrime iAuthFlow v2 Enrolls Google Passkeys That Survive Password Resets Fake GTA VI ISO circulates on the internet a few days after leak, internet sleuths claim 113GB download is padded malware Taiwan charges 9 over illegal AI server exports to China, including Nvidia and Super Micro staff Indian man who fled US arrested on charges he helped scammers siphon $7.5 million from the elderly 58 arrests in global effort to dismantle West African organized crime groups Exposing AnonyMousKIT: AI-Powered PhaaS Supply Chain RTM Locker interview: a ransomware actor on the RaaS market Two WA men charged following AFP-FBI-WAPF disruption of alleged global cybercrime syndicate Love Electric driver data for sale: NI, licence numbers Ransomware group says it stole Berlin data, offers it for auction Malware FTP Banners: The New Dead Drop Resolver Delivering Novel RATs The State of AI-Enabled Malware August 2026: From Brand Abuse to Agentic Execution 19 Chrome and Edge Extensions Deliver a Wallet Drainer and Credential-Stealing Payloads SLEEPWALKER: A Passive Backdoor With Its Own Command Language Hacking One slug, seven editions: the miniOrange SAML SSO bug that let anyone log in as your WordPress admin A Tale of Two SOCs: Insights From Two Red Team Assessments Three UK airports hit by cyber-attack with data of 8.7m customers accessed New GPUThor Rowhammer Defeats ECC on NVIDIA RTX A6000 to Gain Host Root Access PaperCut Releases Emergency Patch for Exploited Zero-Day Philippine Nuclear Agency and Naval Contractor Targeted by Suspected Chinese-Speaking Operator Using Known Vulnerabilities The Hugging Face incident and the road ahead Power Leak: Amazon Kiro IDE Prompt Injection Enables Data Exfiltration Claude Opus 4.6 Bypasses Gym Booking Limit, Cancels Other Users’ Reservations in Tests UniBLEed: Unauthenticated Root RCE on Any Unitree G1 Humanoid Robot Within Bluetooth Range PaperCut Actively Exploited: A Pre-Auth RCE Chain Intelligence and Information Warfare Iranian hackers shut down UK power plant Operation QUICSILVER: China-Nexus Actor Targets Myanmar Diplomats via VHD-Delivered Go Backdoor Digdir stabilizes solutions after cyberattack Justice Department and FBI Seize Platforms Operated and Used by China State-Sponsored Hackers to Target U.S. Critical Infrastructure The infrastructure quartermaster: inside a China-nexus state enablement model Disrupting a new covert influence campaign from Russia Tortoiseshell: New Toolset and Operational Infrastructure Exposed Treasury Launches Unprecedented Campaign Against Iranian Regime on Economic D-Day Dark Caracal Reloaded: New Malware, Same Hunting Grounds Cambodia-focused cluster uses multistage infection chain with localized lures BlueDelta Targets Defense and Diplomacy with HOOKEDGE Cybersecurity Warning about the risks of road meters One billion people are now protected with passkeys on WhatsApp, plus more account security features An ID Check Breach Timeline: 2011–2026 Internet Exposure Reduction Guidance Meta agrees to pay $18 billion to settle US lawsuits over children’s social media addiction DECLARING A NATIONAL EMERGENCY TO SECURE THE UNITED STATES BULK-POWER SYSTEM Follow me on Twitter: @securityaffairs and Facebook and Mastodon Pierluigi Paganini (SecurityAffairs – hacking, newsletter)
Microsoft has disclosed details of a new ClickFix variant, dubbed TerminalFix, that aims to trick users into running a malicious command in Windows Terminal or PowerShell. "While traditional ClickFix campaigns direct victims to the Windows Run dialog, TerminalFix campaigns apply the same technique but direct users to Windows Terminal or PowerShell instead, increasing the likelihood that complex
Anthropic is permanently increasing Claude Code's standard weekly usage limits by 25% for Pro, Max, Team, and seat-based Enterprise plans, but it's not as good as it sounds. If you use Claude, you're actually getting a 17% reduction compared to what you have today. Claude Code currently has a temporary 50% increase in weekly limits, which Anthropic says will remain in place until September 14. "Starting September 14, we're permanently raising standard weekly limits in Claude Code by 25% for Pro, Max, Team, and seat-based Enterprise plans," Anthropic wrote on X. "Until then, the current 50% increase will be in place." It's a clever way to frame words, as it almost sounds like you're winning as a customer, but you're not, and it's a downgrade. If Claude Code's original weekly allowance was 100, the temporary boost gives you 150 today. On September 14, that drops to 125.
The latest version of the Brave browser, 1.94, introduces a feature called ‘Email Aliases’ that allows users to generate disposable email addresses when signing up to a new service. Using an alias address keeps the user's real email address hidden from the website while still forwarding messages from the service. Brave already uses data isolation to prevent websites from inferring user identities based on cookie-based or cache correlations; however, email addresses are still stored on website servers, creating a privacy gap. Brave’s new feature addresses this risk by blocking cross-site identity matching, reducing spam, and protecting users from threats such as phishing attacks that can follow data breaches. “If a website you signed up for is hacked, your information can be leaked and end up with data brokers or worse,” explains Brave in the announcement.
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