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Featured Chrome Browser Extension Caught Intercepting Millions of Users' AI Chats

Featured Chrome Browser Extension Caught Intercepting Millions of Users' AI Chats

Dec 15, 2025 AI Security / Browser Security
A Google Chrome extension with a "Featured" badge and six million users has been observed silently gathering every prompt entered by users into artificial intelligence (AI)-powered chatbots like OpenAI ChatGPT, Anthropic Claude, Microsoft Copilot, DeepSeek, Google Gemini, xAI Grok, Meta AI, and Perplexity. The extension in question is Urban VPN Proxy , which has a 4.7 rating on the Google Chrome Web Store. It's advertised as the "best secured Free VPN access to any website, and unblock content." Its developer is a Delaware-based company named Urban Cyber Security Inc . On the Microsoft Edge Add-ons marketplace, it has 1.3 million installations .  Despite claiming that it allows users to "protect your online identity, stay protected, and hide your IP," an update was pushed to users on July 9, 2025, when version 5.5.0 was released with the AI data harvesting enabled by default using hard-coded settings. Specifically, this is achieved by means of a t...
Dozens of Chrome Extensions Hacked, Exposing Millions of Users to Data Theft

Dozens of Chrome Extensions Hacked, Exposing Millions of Users to Data Theft

Dec 29, 2024 Endpoint Protection / Browser Security
A new attack campaign has targeted known Chrome browser extensions, leading to at least 35 extensions being compromised and exposing over 2.6 million users to data exposure and credential theft. The attack targeted publishers of browser extensions on the Chrome Web Store via a phishing campaign and used their access permissions to insert malicious code into legitimate extensions in order to steal cookies and user access tokens. The first company to shed light the campaign was cybersecurity firm Cyberhaven, one of whose employees was targeted by a phishing attack on December 24, allowing the threat actors to publish a malicious version of the extension. On December 27, Cyberhaven disclosed that a threat actor compromised its browser extension and injected malicious code to communicate with an external command-and-control (C&C) server located on the domain cyberhavenext[.]pro, download additional configuration files, and exfiltrate user data. The phishing email, which purported...
8 More Chrome Extensions Hijacked to Target 4.8 Million Users

8 More Chrome Extensions Hijacked to Target 4.8 Million Users

Aug 16, 2017
Google's Chrome web browser Extensions are under attack with a series of developers being hacked within last one month. Almost two weeks ago, we reported how unknown attackers managed to compromise the Chrome Web Store account of a developer team and hijacked Copyfish extension , and then modified it to distribute spam correspondence to users. Just two days after that incident, some unknown attackers then hijacked another popular extension ' Web Developer ' and then updated it to directly inject advertisements into the web browser of over its 1 million users. After Chris Pederick, the creator of 'Web Developer' Chrome extension that offers various web development tools to its users, reported to Proofpoint that his extension had been compromised, the security vendor analysed the issue and found further add-ons in the Chrome Store that had also been altered. According to the latest report published by the researchers at Proofpoint on Monday, the expanded ...
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Warning – 3 Popular VPN Services Are Leaking Your IP Address

Warning – 3 Popular VPN Services Are Leaking Your IP Address

Mar 15, 2018
Researchers found critical vulnerabilities in three popular VPN services that could leak users' real IP addresses and other sensitive data. VPN, or Virtual Private Network , is a great way to protect your daily online activities that work by encrypting your data and boosting security, as well as useful to obscure your actual IP address. While some choose VPN services for online anonymity and data security, one major reason many people use VPN is to hide their real IP addresses to bypass online censorship and access websites that are blocked by their ISPs. But what if when the VPN you thought is protecting your privacy is actually leaking your sensitive data and real location? A team of three ethical hackers hired by privacy advocate firm VPN Mentor revealed that three popular VPN service providers—HotSpot Shield, PureVPN, and Zenmate—with millions of customers worldwide were found vulnerable to flaws that could compromise user's privacy. The team includes applicat...
When Good Extensions Go Bad: Takeaways from the Campaign Targeting Browser Extensions

When Good Extensions Go Bad: Takeaways from the Campaign Targeting Browser Extensions

Dec 30, 2024 Browser Security / GenAI Security
News has been making headlines over the weekend of the extensive attack campaign targeting browser extensions and injecting them with malicious code to steal user credentials. Currently, over 25 extensions, with an install base of over two million users, have been found to be compromised, and customers are now working to figure out their exposure (LayerX, one of the companies involved in protecting against malicious extensions is offering a complimentary service to audit and remediate organizations' exposure - to sign-up click here ). While this is not the first attack to target browser extensions, the scope and sophistication of this campaign are a significant step up in terms of the threats posed by browser extensions and the risks they pose to organizations. Now that details of the attack have been publicized, users and organizations need to assess their risk exposure to this attack and to browser extensions in general. This article is aimed at helping organizations understand t...
Private Internet Access – Get a Secure VPN to Protect Your Online Privacy

Private Internet Access – Get a Secure VPN to Protect Your Online Privacy

Aug 28, 2017
Since most of us rely upon the Internet for day-to-day activities today, hacking and spying have become a prime concern, and so have online security and privacy. The Internet has become a digital universe with websites collecting your sensitive information and selling them to advertisers, hackers looking for ways to steal your data from the ill-equipped networks, websites, and PCs, and government conducting mass surveillance—every model has shifted to data collection. So, what's the solution and how can you protect your privacy, defend against government surveillance and prevent malware attacks? Virtual Private Network —Yes, one of the most efficient solutions to maximize your privacy is to use a secure VPN service. VPN serves as an encrypted tunnel between your computer and destinations you visit on the internet to secure your Internet traffic and protects you from bad guys getting into your network to steal your sensitive data. When choosing a VPN, Private Internet A...
Two Chrome Extensions Caught Stealing ChatGPT and DeepSeek Chats from 900,000 Users

Two Chrome Extensions Caught Stealing ChatGPT and DeepSeek Chats from 900,000 Users

Jan 06, 2026 Artificial Intelligence / Browser Security
Cybersecurity researchers have discovered two new malicious extensions on the Chrome Web Store that are designed to exfiltrate OpenAI ChatGPT and DeepSeek conversations alongside browsing data to servers under the attackers' control. The names of the extensions, which collectively have over 900,000 users, are below - Chat GPT for Chrome with GPT-5, Claude Sonnet & DeepSeek AI (ID: fnmihdojmnkclgjpcoonokmkhjpjechg, 600,000 users) AI Sidebar with Deepseek, ChatGPT, Claude, and more. (ID: inhcgfpbfdjbjogdfjbclgolkmhnooop, 300,000 users) The findings come weeks after Urban VPN Proxy , another extension with millions of installations on Google Chrome and Microsoft Edge, was caught spying on users' chats with artificial intelligence (AI) chatbots. This tactic of using browser extensions to stealthily capture AI conversations has been codenamed Prompt Poaching by Secure Annex. The two newly identified extensions "were found exfiltrating user conversations and all ...
Two Chrome Extensions Caught Secretly Stealing Credentials from Over 170 Sites

Two Chrome Extensions Caught Secretly Stealing Credentials from Over 170 Sites

Dec 23, 2025 Browser Security / Enterprise Security
Cybersecurity researchers have discovered two malicious Google Chrome extensions with the same name and published by the same developer that come with capabilities to intercept traffic and capture user credentials. The extensions are advertised as a "multi-location network speed test plug-in" for developers and foreign trade personnel. Both the browser add-ons are available for download as of writing. The details of the extensions are as follows - Phantom Shuttle (ID: fbfldogmkadejddihifklefknmikncaj) - 2,000 users (Published on November 26, 2017) Phantom Shuttle (ID: ocpcmfmiidofonkbodpdhgddhlcmcofd) - 180 users (Published on April 27, 2023) "Users pay subscriptions ranging from ¥9.9 to ¥95.9 CNY ($1.40 to $13.50 USD), believing they're purchasing a legitimate VPN service, but both variants perform identical malicious operations," Socket security researcher Kush Pandya said. "Behind the subscription facade, the extensions execute complete traffic ...
DarkSpectre Browser Extension Campaigns Exposed After Impacting 8.8 Million Users Worldwide

DarkSpectre Browser Extension Campaigns Exposed After Impacting 8.8 Million Users Worldwide

Dec 31, 2025 Malware / Ad Fraud
The threat actor behind two malicious browser extension campaigns, ShadyPanda and GhostPoster , has been attributed to a third attack campaign codenamed DarkSpectre that has impacted 2.2 million users of Google Chrome, Microsoft Edge, and Mozilla Firefox. The activity is assessed to be the work of a Chinese threat actor that Koi Security is tracking under the moniker DarkSpectre . In all, the campaigns have collectively affected over 8.8 million users spanning a period of more than seven years. ShadyPanda was first unmasked by the cybersecurity company earlier this month as targeting all three browser users to facilitate data theft, search query hijacking, and affiliate fraud. It has been found to affect 5.6 million users, including 1.3 newly identified victims stemming from over 100 extensions flagged as connected to the same cluster. This also includes an Edge add-on named "New Tab - Customized Dashboard" that features a logic bomb that waits for three days prior to t...
100+ Fake Chrome Extensions Found Hijacking Sessions, Stealing Credentials, Injecting Ads

100+ Fake Chrome Extensions Found Hijacking Sessions, Stealing Credentials, Injecting Ads

May 20, 2025 Credential Theft / Browser Security
An unknown threat actor has been attributed to creating several malicious Chrome Browser extensions since February 2024 that masquerade as seemingly benign utilities but incorporate covert functionality to exfiltrate data, receive commands, and execute arbitrary code. "The actor creates websites that masquerade as legitimate services, productivity tools, ad and media creation or analysis assistants, VPN services, crypto, banking and more to direct users to install corresponding malicious extensions on Google's Chrome Web Store (CWS)," the DomainTools Intelligence (DTI) team said in a report shared with The Hacker News. While the browser add-ons appear to offer the advertised features, they also enable credential and cookie theft, session hijacking, ad injection, malicious redirects, traffic manipulation, and phishing via DOM manipulation. Another factor that works in the extensions' favor is that they are configured to grant themselves excessive permissions via...
GhostPoster Malware Found in 17 Firefox Add-ons with 50,000+ Downloads

GhostPoster Malware Found in 17 Firefox Add-ons with 50,000+ Downloads

Dec 17, 2025 Ad Fraud / Browser Security
A new campaign named GhostPoster has leveraged logo files associated with 17 Mozilla Firefox browser add-ons to embed malicious JavaScript code designed to hijack affiliate links, inject tracking code, and commit click and ad fraud. The extensions have been collectively downloaded over 50,000 times, according to Koi Security, which discovered the campaign. The add-ons are no longer available. These browser programs were advertised as VPNs, screenshot utilities, ad blockers, and unofficial versions of Google Translate. The oldest add-on, Dark Mode, was published on October 25, 2024, offering the ability to enable a dark theme for all websites. The full list of the browser add-ons is below - Free VPN Screenshot Weather (weather-best-forecast) Mouse Gesture (crxMouse) Cache - Fast site loader Free MP3 Downloader Google Translate (google-translate-right-clicks) Traductor de Google Global VPN - Free Forever Dark Reader Dark Mode Translator - Google Bing Baidu DeepL Weather...
OtterCookie v4 Adds VM Detection and Chrome, MetaMask Credential Theft Capabilities

OtterCookie v4 Adds VM Detection and Chrome, MetaMask Credential Theft Capabilities

May 09, 2025 Malware / Browser Security
The North Korean threat actors behind the Contagious Interview campaign have been observed using updated versions of a cross-platform malware called OtterCookie with capabilities to steal credentials from web browsers and other files. NTT Security Holdings, which detailed the new findings, said the attackers have "actively and continuously" updated the malware, introducing versions v3 and v4 in February and April 2025, respectively. The Japanese cybersecurity company is tracking the cluster under the name WaterPlum , which is also known as CL-STA-0240, DeceptiveDevelopment, DEV#POPPER, Famous Chollima, PurpleBravo, and Tenacious Pungsan. OtterCookie was first documented by NTT last year after having observed it in attacks since September 2024. Delivered by means of a JavaScript payload via a malicious npm package, trojanized GitHub or Bitbucket repository, or a bogus videoconferencing app, it's designed to contact an external server to execute commands on compromis...
WebRTC Vulnerability leaks Real IP Addresses of VPN Users

WebRTC Vulnerability leaks Real IP Addresses of VPN Users

Feb 03, 2015
An extremely critical vulnerability has recently been discovered in WebRTC (Web Real-Time Communication) , an open-source standard that enables the browsers to make voice or video calls without needing any plug-ins. AFFECTED PRODUCTS Late last month, security researchers revealed a massive security flaw that enables website owner to easily see the real IP addresses of users through WebRTC , even if they are using a VPN or even PureVPN to mask their real IP addresses. The security glitch affects WebRTC-supporting browsers such as Google Chrome and Mozilla Firefox, and appears to be limited to Windows operating system only, although users of Linux and Mac OS X are not affected by this vulnerability. HOW DOES THE WebRTC FLAW WORKS WebRTC allows requests to be made to STUN (Session Traversal Utilities for NAT) servers which return the "hidden" home IP-address as well as local network addresses for the system that is being used by the user. The results of t...
New Malware Hits 300,000 Users with Rogue Chrome and Edge Extensions

New Malware Hits 300,000 Users with Rogue Chrome and Edge Extensions

Aug 10, 2024 Browser Security / Online Fraud
An ongoing, widespread malware campaign has been observed installing rogue Google Chrome and Microsoft Edge extensions via a trojan distributed via fake websites masquerading as popular software. "The trojan malware contains different deliverables ranging from simple adware extensions that hijack searches to more sophisticated malicious scripts that deliver local extensions to steal private data and execute various commands," the ReasonLabs research team said in an analysis. "This trojan malware, existing since 2021, originates from imitations of download websites with add-ons to online games and videos." The malware and the extensions have a combined reach of at least 300,000 users of Google Chrome and Microsoft Edge, indicating that the activity has a broad impact. At the heart of the campaign is the use of malvertising to push lookalike websites promoting known software like Roblox FPS Unlocker, YouTube, VLC media player, Steam, or KeePass to trick users s...
PLAYFULGHOST Delivered via Phishing and SEO Poisoning in Trojanized VPN Apps

PLAYFULGHOST Delivered via Phishing and SEO Poisoning in Trojanized VPN Apps

Jan 04, 2025 Malware / VPN Security
Cybersecurity researchers have flagged a new malware called PLAYFULGHOST that comes with a wide range of information-gathering features like keylogging, screen capture, audio capture, remote shell, and file transfer/execution. The backdoor, according to Google's Mandiant Managed Defense team, shares functional overlaps with a known remote administration tool referred to as Gh0st RAT , which had its source code publicly leaked in 2008. PLAYFULGHOST's initial access pathways include the use of phishing emails bearing code of conduct-related lures or search engine optimization (SEO) poisoning techniques to distribute trojanized versions of legitimate VPN apps like LetsVPN. "In one phishing case, the infection begins by tricking the victim into opening a malicious RAR archive disguised as an image file by using a .jpg extension," the company said . "When extracted and executed by the victim, the archive drops a malicious Windows executable, which eventually dow...
Popular Chrome Extensions Leak API Keys, User Data via HTTP and Hard-Coded Credentials

Popular Chrome Extensions Leak API Keys, User Data via HTTP and Hard-Coded Credentials

Jun 05, 2025 Browser Security / Online Safety
Cybersecurity researchers have flagged several popular Google Chrome extensions that have been found to transmit data in HTTP and hard-code secrets in their code, exposing users to privacy and security risks. "Several widely used extensions [...] unintentionally transmit sensitive data over simple HTTP," Yuanjing Guo, a security researcher in the Symantec's Security Technology and Response team, said . "By doing so, they expose browsing domains, machine IDs, operating system details, usage analytics, and even uninstall information, in plaintext." The fact that the network traffic is unencrypted also means that they are susceptible to adversary-in-the-middle (AitM) attacks, allowing malicious actors on the same network such as a public Wi-Fi to intercept and, even worse, modify this data, which could lead to far more serious consequences. The list of identified extensions are below - SEMRush Rank (extension ID: idbhoeaiokcojcgappfigpifhpkjgmab) and P...
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