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Browser maker Mozilla is urging users to update their Firefox instances to the latest version to avoid facing issues with using add-ons due to the impending expiration of a root certificate. "On March 14, 2025, a root certificate used to verify signed content and add-ons for various Mozilla projects, including Firefox, will expire," Mozilla said . "Without updating to Firefox version 128 or higher (or ESR 115.13 + for ESR users, including Windows 7/8/8.1 and macOS 10.12-10.14 users), this expiration may cause significant issues with add-ons, content signing, and DRM-protected media playback." Mozilla said the latest version of Firefox includes a new root certificate that will prevent this from happening. The update is crucial for all users of Firefox running a version prior to 128, or Extended Support Release (ESR) versions before 115.13, both of which were released on July 9, 2024. This includes all versions of Firefox for Windows, macOS, Linux, and Android...

Good news for Firefox lovers! The Mozilla Foundation has introduced a bunch of new features in Firefox to improve browser security with the launch of Firefox 32, now available for Windows, Mac, Linux, and Android platforms. The new version of Firefox makes the browser even more competitive among others. Firefox version 32 has some notable security improvements, including a new HTTP cache for improved performance, public key pinning - a defense that would help protect its users from man-in-the-middle and other attacks, and easy language switching on Android. PUBLIC KEY PINNING ENABLED BY-DEFAULT In the latest Firefox version 32, Mozilla has enabled Public Key Pinning support by default that will protect its users from man-in-the-middle-attacks and rogue certificate authorities. Public key pinning is a security measure that ensures people that they are connecting to the websites they intend to. Pinning allows users to keep track of certificates in order to specify wh...

This week you have quite a long list of updates to follow from Microsoft, Adobe as well as Firefox. Despite announcing plans to kill its monthly patch notification for Windows 10, the tech giant has issued its May 2015 Patch Tuesday , releasing 13 security bulletins that addresses a total of 48 security vulnerabilities in many of their products. Separately, Adobe has also pushed a massive security update to fix a total of 52 vulnerabilities in its Flash Player, Reader, AIR and Acrobat software. Moreover, Mozilla has fixed 13 security flaws in its latest stable release of Firefox web browser, Firefox 38, including five critical flaws. First from the Microsoft's side: MICROSOFT PATCH TUESDAY Three out of 13 security bulletins issued by the company are rated as 'critical', while the rest are 'important' in severity, with none of these vulnerabilities are actively exploited at this time. The affected products include Internet Explorer (IE), ...

Mozilla has officially released its latest build Firefox 31 for all supported platforms, addressing 11 vulnerabilities in total, three of which are marked critical that could have been exploited by hackers to mount remote code execution attacks. Mozilla Firefox recommends its users to install the security update as soon as possible, warning that the three critical vulnerabilities discovered in its browser could be exploited by attackers and leverage them to " run attacker code and install software, requiring no user interaction beyond normal browsing ". CRITICAL VULNERABILITIES The three major vulnerabilities are as follows: MFSA 2014-62 - This is one of the three critical vulnerabilities reported by Patrick Cozzi and get fixed in the newer version of the browser. The vulnerability allows the exploitation of a WebGL crash with Cesium JavaScript library. Much details about the flaw are not known at the time, but Mozilla notes that the flaw cannot be exploi...

The critical Firefox vulnerability being actively exploited in the wild to unmask Tor users has been patched with the release of new browser updates. Both Mozilla and Tor Project has patched the vulnerability that allows attackers to remotely execute malicious code on Windows operating system via memory corruption vulnerability in Firefox web browser. Tor Browser Bundle is a repackaged version of the open-source Mozilla Firefox browser that runs connections through the Tor anonymizing network configured to hide its user's public IP address. However, the exploit code released by an unnamed online user was currently being exploited against Tor Browser users to leak the potentially identifying information of Tor users. "The security flaw responsible for this urgent release is already actively exploited on Windows systems," an official of the anonymity network wrote in an advisory published on Wednesday.  "Even though there is currently...no similar explo...

Important Update [21 June 2019] — Mozilla on Thursday released another update Firefox version 67.0.4 to patch a second zero-day vulnerability. If you use the Firefox web browser, you need to update it right now. Mozilla earlier today released Firefox 67.0.3 and Firefox ESR 60.7.1 versions to patch a critical zero-day vulnerability in the browsing software that hackers have been found exploiting in the wild. Discovered and reported by Samuel Groß, a cybersecurity researcher at Google Project Zero, the vulnerability could allow attackers to remotely execute arbitrary code on machines running vulnerable Firefox versions and take full control of them. The vulnerability, identified as CVE-2019-11707 , affects anyone who uses Firefox on desktop (Windows, macOS, and Linux) — whereas, Firefox for Android, iOS, and Amazon Fire TV are not affected. According to an advisory , the flaw has been labeled as a type confusion vulnerability in Firefox that can result in an exploitable ...

Important Update (21 June 2019) ➤  The Tor Project on Friday released second update ( Tor Browser 8.5.3 ) for its privacy web-browser that patches the another Firefox zero-day vulnerability patched this week. Following the latest critical update for Firefox, the Tor Project today released an updated version of its anonymity and privacy browser to patch the same Firefox vulnerability in its bundle. Earlier this week, Mozilla released Firefox 67.0.3 and Firefox ESR 60.7.1 versions to patch a critical actively-exploited vulnerability ( CVE-2019-11707 ) that could allow attackers to remotely take full control over systems running the vulnerable browser versions. Besides updating Firefox, the latest Tor Browser 8.5.2 for desktops also includes updated NoScript version 10.6.3 that fixes a few known issues. According to the Tor Project Team, if you are already using Tor browser with "safer" and "safest" security levels, the flaw doesn't affect you. For som...

The latest version of Mozilla's Firefox browser has been taken offline after a security vulnerability was discovered. Mozilla's Firefox 16 web browser got its regular six-weekly update yesterday but the organisation decided to pull the browser hours after the release. The outfit claimed it became aware of a security vulnerability in Firefox 16 and that updates are expected to ship at some point today. According to the Mozilla Security Blog , Firefox 16 features a security vulnerability that allows " a malicious site to potentially determine which websites users have visited and have access to the URL or URL parameters. " " As a precaution, users can downgrade to version 15.0.1 " - Firefox 16 offers several new features, most of which are aimed at developers. One such feature is the Developer Command Line, which provides keyboard control over the Developer Tools. Other features include CSS3 Animations, Image Values, IndexedDB, Transitions, and Transforms. ...

Attention! Are you using Firefox as your web browsing software on your Windows, Linux, or Mac systems? If yes, you should immediately update your free and open-source Firefox web browser to the latest version available on Mozilla's website. Why the urgency? Mozilla earlier today released Firefox 72.0.1 and Firefox ESR 68.4.1 versions to patch a critical zero-day vulnerability in its browsing software that an undisclosed group of hackers is actively exploiting in the wild. Tracked as ' CVE-2019-17026 ,' the bug is a critical 'type confusion vulnerability' that resides in the IonMonkey just-in-time (JIT) compiler of the Mozilla's JavaScript engine SpiderMonkey. In general, a type confusion vulnerability occurs when the code doesn't verify what objects it is passed to and blindly uses it without checking its type, allowing attackers to crash the application or achieve code execution. Without revealing details about the security flaw and any det...

Okay, folks, it's time to update your Firefox web browser once again—yes, for the second time this week. After patching a critical actively-exploited vulnerability in Firefox 67.0.3 earlier this week, Mozilla is now warning millions of its users about a second zero-day vulnerability that attackers have been found exploiting in the wild. The newly patched issue ( CVE-2019-11708 ) is a "sandbox escape" vulnerability, which if chained together with the previously patched "type confusion" bug ( CVE-2019-11707 ), allows a remote attacker to execute arbitrary code on victims' computers just by convincing them into visiting a malicious website. Browser sandboxing is a security mechanism that keeps third-party processes isolated and confined to the browser, preventing them from damaging other sensitive parts of a computer's operating system. "Insufficient vetting of parameters passed with the Prompt:Open IPC message between child and parent proc...

Mozilla has rolled out the latest Version 37 of its Firefox browser for Windows desktop, Mac, Linux and Android operating systems. The new release also adds patches for 13 different security advisories along with some new security improvements as well as user-experience features. The biggest security feature added to Firefox 37 among others is the "Opportunistic Encryption" (OE) for servers and websites that support " HTTP/2 AltSvc. " Opportunistic Encryption (OE) allows Firefox browser to encrypt the traffic over plaintext HTTP connection without any need to authenticate it. This will help you to create, not complete, but some confidentiality from attackers to eavesdrop on your connection. So Opportunistic encryption can be implemented with very minimal changes to an existing IPsec implementation. The move by Mozilla is really a bonus for HTTP users with no encryption measure at all, but still it is not as good as authenticated encryption ...

Mozilla has revealed that a critical security flaw impacting Firefox and Firefox Extended Support Release (ESR) has come under active exploitation in the wild. The vulnerability, tracked as CVE-2024-9680 (CVSS score: 9.8), has been described as a use-after-free bug in the Animation timeline component. "An attacker was able to achieve code execution in the content process by exploiting a use-after-free in Animation timelines," Mozilla said in a Wednesday advisory.  "We have had reports of this vulnerability being exploited in the wild." Security researcher Damien Schaeffer from Slovakian company ESET has been credited with discovering and reporting the vulnerability. The issue has been addressed in the following versions of the web browser -  Firefox 131.0.2 Firefox ESR 128.3.1, and Firefox ESR 115.16.1. There are currently no details on how the vulnerability is being exploited in real-world attacks and the identity of the threat actors behind them. T...

Warning for Adobe users! Another zero-day vulnerability has been discovered in Adobe Flash Player   that is actively being exploited by cyber crooks in drive-by download attacks, security researchers warned today. This is for the third time in last few weeks when Adobe is dealing with a zero day vulnerability in Flash Player. The Adobe Flash Player Vulnerability identified as CVE-2015-0313 , exists in the latest version of Flash Player, i.e. version 16.0.0.296 and earlier. In late January, Adobe released an updated version of its Flash player software that patches zero-day vulnerability, tracked as CVE-2015-0311 , spotted by French security researcher Kafeine. This Adobe Flash Player Vulnerability was also being actively exploited via Malvertisement and drive-by-download attacks. In case of a "drive-by-download" attack, an attacker downloads a malicious software to a victim's computer without their knowledge or explicit consent. As a result, the flaw cou...

Hackers are actively exploiting a zero-day vulnerability in Firefox to unmask Tor Browser users, similar to what the FBI exploited during an investigation of a child pornography site. Tor (The Onion Router) is an anonymity software that not only provides a safe heaven to human rights activists, journalists, government officials, but also is a place where drugs, assassins for hire, child pornography, and other illegal activities has allegedly been traded. A Javascript zero-day exploit currently being actively exploited in the wild is designed to remotely execute malicious code on the Windows operating system via memory corruption flaw in Firefox web browser. The exploit code was publicly published by an admin of the SIGAINT privacy-oriented public email service on the Tor-Talk mailing list. The mailing list message reveals that the zero-day exploit affecting Firefox is currently being exploited against Tor Browser users by unknown attackers to leak the potentially identifyi...

Tor — a privacy oriented encrypted anonymizing service, has announced the launch of its next version of Tor Browser Bundle, i.e. Tor version 4.0.4 , mostly supposed to improve the built-in utilities, privacy and security of online users on the Internet. Tor Browser helps users to browse the Internet in a complete anonymous way. The powerful Tor Browser Bundle, an anonymous web browser developed by the Tor Project, received some updates in its software. Tor Browser Bundle is basically an Internet browser based on Mozilla Firefox configured to protect the users' anonymity via Tor and Vidalia. The anonymity suite also includes 3 Firefox extensions: Torbutton, NoScript and HTTPS-Everywhere. NEW FEATURES The latest version, Tor Browser Bundle 4.0.4, has been recently released, with a few number of new features: Updated to Firefox to 31.5.0esr with important security updates. Update OpenSSL to 1.0.1l Update NoScript to 2.6.9.15 Update HTTPS-Everywhere to 4.0.3 B...

Mozilla has released updates to address a critical security flaw impacting its Firefox browser for Windows, merely days after Google patched a similar flaw in Chrome that came under active exploitation as a zero-day. The security vulnerability, CVE-2025-2857, has been described as a case of an incorrect handle that could lead to a sandbox escape. "Following the recent Chrome sandbox escape (CVE-2025-2783), various Firefox developers identified a similar pattern in our IPC [inter-process communication] code," Mozilla said in an advisory. "A compromised child process could cause the parent process to return an unintentionally powerful handle, leading to a sandbox escape." The shortcoming, which affects Firefox and Firefox ESR, has been addressed in Firefox 136.0.4, Firefox ESR 115.21.1, and Firefox ESR 128.8.1. There is no evidence that CVE-2025-2857 has been exploited in the wild. The Tor Project has also shipped a security update for the Tor Browser (versio...

Mozilla has released security updates to address two critical security flaws in its Firefox browser that could be potentially exploited to access sensitive data or achieve code execution. The vulnerabilities, both of which were exploited as a zero-day at Pwn2Own Berlin, are listed below - CVE-2025-4918 - An out-of-bounds access vulnerability when resolving Promise objects that could allow an attacker to perform read or write on a JavaScript Promise object CVE-2025-4919 - An out-of-bounds access vulnerability when optimizing linear sums that could allow an attacker to perform read or write on a JavaScript object by confusing array index sizes In other words, successful exploitation of either of the flaws could permit an adversary to achieve out-of-bounds read or write , which could then be abused to access otherwise sensitive information or result in memory corruption that could pave the way for code execution. The vulnerabilities affect the following versions of the Firefox b...

A previously undocumented China-aligned advanced persistent threat (APT) group named PlushDaemon has been linked to a supply chain attack targeting a South Korean virtual private network (VPN) provider in 2023, according to new findings from ESET. "The attackers replaced the legitimate installer with one that also deployed the group's signature implant that we have named SlowStepper – a feature-rich backdoor with a toolkit of more than 30 components," ESET researcher Facundo Muñoz said in a technical report shared with The Hacker News. PlushDaemon is assessed to be a China-nexus group that has been operational since at least 2019, targeting individuals and entities in China, Taiwan, Hong Kong, South Korea, the United States, and New Zealand. Central to its operations is a bespoke backdoor called SlowStepper, which is described as a large toolkit consisting of around 30 modules, programmed in C++, Python, and Go. Another crucial aspect of its attacks is the hijackin...

Zerodium, the infamous exploit vendor that earlier this year offered $1 million for submitting a zero-day exploit for Tor Browser , today publicly revealed a critical zero-day flaw in the anonymous browsing software that could reveal your identity to the sites you visit. In a Tweet, Zerodium shared a zero-day vulnerability that resides in the NoScript browser plugin comes pre-installed with the Mozilla Firefox bundled in the Tor software. NoScript is a free browser extension that blocks malicious JavaScript, Java, Flash and other potentially dangerous content on all web pages by default, though users can whitelist sites they trust. According to Zerodium, NoScript "Classic" versions 5.0.4 to 5.1.8.6--with 'Safest' security level enabled--included in Tor Browser 7.5.6 can be bypassed to run any JavaScript file by changing its content-type header to JSON format. In other words, a website can exploit this vulnerability to execute malicious JavaScript on victim...

Hey there, it's your weekly dose of " what the heck is going on in cybersecurity land " – and trust me, you NEED to be in the loop this time. We've got everything from zero-day exploits and AI gone rogue to the FBI playing crypto kingpin – it's full of stuff they don't 🤫 want you to know. So let's jump in before we get FOMO. ⚡ Threat of the Week GoldenJackal Hacks Air-Gapped Systems: Meet GoldenJackal, the hacking crew you've probably never heard of – but should definitely know about now. They're busting into super-secure, air-gapped computer systems with sneaky worms spread through infected USB drives (yes, really!), proving that even the most isolated networks aren't safe. ESET researchers caught them red-handed using two different custom-made tools to target high-profile victims, including a South Asian embassy in Belarus and a European Union government organization. 🔔 Top News Mozilla Patches Firefox 0-Day: Mozilla patched a...