Privilege escalation via chrome window.opener — Mozilla

Security researcher David James reported that a content window which is opened by a chrome window retains a reference to the chrome window via the window.opener property. Using this reference, content in the new window can access functions inside the chrome window, such as eval, and use these...

Crashes with evidence of memory corruption (rv:1.9.1.2/1.9.0.13) — Mozilla

Mozilla developers and community members identified and fixed several stability bugs in the browser engine used in Firefox and other Mozilla-based products. Some of these crashes showed evidence of memory corruption under certain circumstances and we presume that with enough effort at least some ...

Heap/integer overflows in font glyph rendering libraries — Mozilla

oCERT security researcher Will Drewry reported a series of heap and integer overflow vulnerabilities which independently affected multiple font glyph rendering libraries. On Linux platforms libpango was susceptible to the vulnerabilities while on OS X CoreGraphics was similarly vulnerable. An...

XML data theft via RDFXMLDataSource and cross-domain redirect — Mozilla

Mozilla security researcher Georgi Guninski reported that a website could use nsIRDFService and a cross-domain redirect to steal arbitrary XML data from another domain, a violation of the same-origin policy. This vulnerability could be used by a malicious website to steal private data from users...

JavaScript privilege escalation and arbitrary code execution — Mozilla

Mozilla contributors mozbugra4, Boris Zbarsky, and Johnny Stenback reported a series of vulnerabilities which allow scripts from page content to run with elevated privileges. mozbugra4 demonstrated additional variants of MFSA 2007-25 and MFSA2007-35 arbitrary code execution through XPCNativeWrapp...

Heap buffer overflow in external MIME bodies — Mozilla

Security research firm iDefense reported that researcher regenrecht discovered a heap-based buffer overflow vulnerability in Mozilla mail code which could potentially allow an attacker to run arbitrary code. The vulnerability is caused by allocating a buffer that can be three bytes too small in...

jar: URI scheme XSS hazard — Mozilla

The jar: URI scheme was introduced as a mechanism to support digitally signed web pages, enabling web sites to load pages packaged in zip archives containing signatures in java-archive format...

Privilege escalation through XUL persist. — Mozilla

In certain circumstances persisted XUL attributes are associated with the wrong URL. If an attacker can get a persisted string associated with an URL that will later eval or execute that attribute in a privileged context then the attacker's code will run with the full permissions of the browser...

Downloading executables with "Save Image As..." — Mozilla

By layering a transparent image link to an executable on top of a visible and presumably desirable image a malicious site might be able to convince some visitors to right-click and choose "Save image as..." from the context menu and fool them by giving them the executable instead. When the users...

Script injection from Firefox sidebar panel using data: — Mozilla

Sites can use the search target to open links in the Firefox sidebar. A missing security check allows the sidebar to inject data: urls containing scripts into any page open in the browser. This could be used to steal cookies, passwords or other sensitive data...

Security Vulnerabilities fixed in Firefox ESR 140.12 — Mozilla

Memory safety bugs present in Firefox ESR 140.11, Thunderbird ESR 140.11, Firefox 151 and Thunderbird 151. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. Memory safety bugs present in...

Security Vulnerabilities fixed in Firefox ESR 140.7 — Mozilla

Memory safety bugs present in Firefox ESR 140.6, Thunderbird ESR 140.6, Firefox 146 and Thunderbird 146. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code...

Security Vulnerabilities fixed in Firefox ESR 128.10.1 — Mozilla

An attacker was able to perform an out-of-bounds read or write on a JavaScript Promise object. An attacker was able to perform an out-of-bounds read or write on a JavaScript object by confusing array index sizes...

Security Vulnerabilities fixed in Thunderbird 128.10.1 — Mozilla

Thunderbird parses addresses in a way that can allow sender spoofing in case the server allows an invalid From address to be used. For example, if the From header contains an invalid value "Spoofed Name [email protected] [email protected]", Thunderbird treats [email protected] as the...

Security Vulnerability fixed in Firefox 131.0.3 — Mozilla

When manipulating the selection node cache, an attacker may have been able to cause unexpected behavior, potentially leading to an exploitable crash...

Security Vulnerabilities fixed in Firefox ESR 128.2 — Mozilla

A difference in the handling of StructFields and ArrayTypes in WASM could be used to trigger an exploitable type confusion vulnerability. A potentially exploitable type confusion could be triggered when looking up a property name on an object being used as the with environment. Internal browser...

Security Vulnerabilities fixed in Firefox ESR 115.5.0 — Mozilla

On some systems—depending on the graphics settings and drivers—it was possible to force an out-of-bounds read and leak memory data into the images created on the canvas element. It was possible to cause the use of a MessagePort after it had already been freed, which could potentially have led to ...

CSP reports fail to strip location information for embedded iframe pages — Mozilla

Security researcher Muneaki Nishimura nishimunea of Recruit Technologies Co.,Ltd. reported that Content Security Policy CSP violation reports contained full path information for cross-origin iframe navigations in violation of the CSP specification. This could result in information disclosure...

Arbitrary file overwriting through Mozilla Maintenance Service with hard links — Mozilla

Security researcher James Forshaw, security researcher with Google Project Zero, reported that the Mozilla Maintenance Service on Windows can be made to write its log file in a restricted location with an arbitrary file name through the use of a hard link by means of a race condition. This can...

Buffer overflow in libstagefright during MP4 video playback — Mozilla

Security researcher Pantrombka reported a buffer overflow in the libstagefright library during video playback when certain invalid MP4 video files led to the allocation of a buffer that was too small for the content. This led to a potentially exploitable crash...

Application Installation doorhanger persists on navigation — Mozilla

Mozilla developer Myk Melez reported that with specifically timed page navigation, the doorhanger notification for Web App installation could persist from one site to another without being dismissed by the navigation. This could be used by a malicious site to trick a user into installing an...

Use-after-free in Vibrate — Mozilla

Security researcher regenrecht reported, via TippingPoint's Zero Day Initiative, a use-after-free using the domDoc pointer within Vibrate library. This can lead to arbitrary code execution when exploited...

XSS using SJOW scripted function — Mozilla

Mozilla security researcher mozbugra4 reported that the wrapper class XPCSafeJSObjectWrapper SJOW on the Mozilla 1.9.1 development branch has a logical error in its scripted function implementation that allows the caller to run the function within the context of another site. This is a violation ...

Characters mapped to U+FFFD in 8 bit encodings cause subsequent character to vanish — Mozilla

Security researcher O. Andersen reported that undefined positions within various 8 bit character encodings are mapped to the sequence U+FFFD which when displayed causes the immediately following character to disappear from the text run. This could potentially contribute to XSS problems on sites...

WOFF heap corruption due to integer overflow — Mozilla

Security researcher Evgeny Legerov of Intevydis reported that the WOFF decoder contains an integer overflow in a font decompression routine. This flaw could result in too small a memory buffer being allocated to store a downloadable font. An attacker could use this vulnerability to crash a victim...

URL spoofing with invisible control characters — Mozilla

Mozilla contributor Masahiro Yamada reported that certain invisible control characters were being decoded when displayed in the location bar, resulting in fewer visible characters than were present in the actual location. An attacker could use this vulnerability to spoof the location bar and...

Remote site run as local file via Windows URL shortcut — Mozilla

Mozilla community member Geoff reported that URL shortcut files on Windows for example, saved IE favorites could be interpreted as if they were in the local file context when opened by Firefox, although the referenced remote content would be downloaded and displayed. Scripts loaded from the remot...

Crash in JavaScript garbage collector — Mozilla

Fixes for security problems in the JavaScript engine described in MFSA 2008-15 CVE-2008-1237 introduced a stability problem, where some users experienced crashes during JavaScript garbage collection. This is being fixed primarily to address stability concerns. We have no demonstration that this...

Possible information disclosure in BMP decoder — Mozilla

Security researcher Gynvael Coldwind of Vexillium crediting help from udevd and porneL demonstrated that BMP images could be used to reveal small chunks of uninitialized memory that might contain sensitive data from other pages or other programs, and that this data could be extracted from the ima...

File action dialog tampering — Mozilla

Security researcher Michal Zalewski demonstrated that timer-enabled security dialogs can be subverted by attackers using JavaScript to change the window focus. Zalewski showed that a user could be tricked into confirming a security dialog of this type by bringing the dialog back into focus right...

Memory corruption vulnerabilities (rv:1.8.1.10) — Mozilla

The Firefox 2.0.0.10 update contains fixes for three bugs that improve the stability of the product. These crashes showed some evidence of memory corruption under certain circumstances and we presume that with enough effort at least some of these could be exploited to run arbitrary code...

XPCNativeWraper pollution using Script object — Mozilla

Mozilla security researcher mozbugra4 reported that it was possible to use the Script object to modify XPCNativeWrappers in such a way that subsequent access by the browser chrome--such as by right-clicking to open a context menu--can cause attacker-supplied javascript to run with the same...

Frame spoofing while window is loading — Mozilla

Ronen Zilberman and Michal Zalewski both reported that it was possible to exploit a timing issue to inject content into about:blank frames in a page. When opening a window from a script, it is possible to spoof the content of the newly opened window's frames within a short time frame, while the...

Persistent Autocomplete Denial of Service — Mozilla

Marcel reported that a malicious web page could perform a denial of service attack against the form autocomplete feature that would persist from session to session until the malicious form data was deleted. Filling a text field with millions of characters and submitting the form will cause the...

Privilege escalation by setting img.src to javascript: URI — Mozilla

mozbugra4 reports that the fix for MFSA 2006-72 in Firefox 1.5.0.9 and Firefox 2.0.0.1 introduced a regression that allows scripts from web content to execute arbitrary code by setting the src attribute of an IMG tag to a specially crafted javascript: URI...

onUnload + document.write() memory corruption — Mozilla

Michal Zalewski reported a memory corruption vulnerability in Firefox 2.0.0.1 involving mixing the onUnload event handler and self-modifying document.write calls. This flaw was introduced in Firefox 2.0.0.1 and 1.5.0.9 and does not affect earlier versions; it is fixed in Firefox 2.0.0.2 and 1.5.0...

RSS Feed-preview referrer leak — Mozilla

Jared Breland reported on LEGROOM.net that when the new "Feed Preview" feature in Firefox 2.0 retrieves the icons of the installed web-based feed viewers it is potentially informing those services of your feed-browsing habits by sending the URL of the feed in a referrer header with each icon...

Auto-update compromise through DNS and SSL spoofing — Mozilla

The Firefox and Thunderbird auto-update mechanism protects itself against DNS spoofing using SSL; only a site presenting a valid certificate for aus2.mozilla.org will be trusted as a source of update information. Jon Oberheide points out, however, that many users accept unverifiable self-signed...

Buffer overflow in crypto.signText() — Mozilla

Mikolaj Habryn discovered an array index bug in crypto.signText that results in overflowing an allocated array of pointers by two when optional Certificate Authority name arguments are passed in...

EvalInSandbox escape (Proxy Autoconfig, Greasemonkey) — Mozilla

Mozilla researcher mozbugra4 demonstrated that javascript run via EvalInSandbox can escape the sandbox and gain elevated privilege by calling valueOf on objects created outside the sandbox and inserted into it. Malicious scripts could use these privileges to compromise your computer or data...

Table Rebuilding Code Execution Vulnerability — Mozilla

An anonymous researcher for TippingPoint and the Zero Day Initiative reports that an invalid and nonsensical ordering of table-related tags causes Mozilla to use a negative array index. This invalid memory use can be exploited to run code of the attacker's choice...

Cross-site JavaScript injection using event handlers — Mozilla

shutdown reported a method of injecting running JavaScript code into a page on another site using a modal alert to suspend an event handler while a new page is being loaded. This vulnerability allows an attacker to steal any confidential information the new page might contain, including any...

Memory corruption via QueryInterface on Location, Navigator objects — Mozilla

Calling the QueryInterface method of the built-in Location and Navigator objects causes memory corruption that might be exploitable to run arbitrary code...

"AnyName" entrainment and access control hazard — Mozilla

The implementation of E4X introduced an internal "AnyName" object which was unintentionally exposed to web content. This singleton object could be used by two cooperating domains as a communication channel to get around same-origin restrictions that prevent direct access from one window or frame ...

Security Vulnerabilities fixed in Firefox ESR 153.5 — Mozilla

Note : We have changed how we publish advisories. We no longer roll all internally identified memory safety vulnerabilities into a single CVE and are now issuing an advisory for every individual bug. CVE-2026-109704: Privilege escalation in the Application Update component Reporter Noel Impact hi...

Security Vulnerabilities fixed in Firefox ESR 115.35 — Mozilla

Memory safety bugs present in Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird ESR 140.9, Firefox 149 and Thunderbird 149. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code...

Security Vulnerabilities fixed in Firefox ESR 140.9 — Mozilla

Memory safety bugs present in Firefox ESR 140.8, Thunderbird ESR 140.8, Firefox 148 and Thunderbird 148. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. Memory safety bugs present in...

Security Vulnerabilities fixed in Firefox ESR 140.4 — Mozilla

Use-after-free in MediaTrackGraphImpl::GetInstance A compromised web process was able to trigger out of bounds reads and writes in a more privileged process using manipulated WebGL textures. A compromised web process using malicious IPC messages could have caused the privileged browser process to...

Security Vulnerabilities fixed in Firefox 142 — Mozilla

An attacker was able to perform memory corruption in the GMP process which processes encrypted media. This process is also heavily sandboxed, but represents slightly different privileges from the content process. Same-origin policy bypass in the Graphics: Canvas2D component. Uninitialized memory ...

Security Vulnerabilities fixed in Firefox 135.0.1 — Mozilla

Memory safety bugs present in Firefox 135. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code...