Information disclosure

A mishandled security check when creating a WebSocket in a WebWorker caused the Content Security Policy connect-src header to be ignored. This could lead to connections to restricted origins from inside WebWorkers. This vulnerability affects Firefox 109, Thunderbird 102.7, and Firefox ESR 102.7...

Design/Logic Flaw

Cross-compartment wrappers wrapping a scripted proxy could have caused objects from other compartments to be stored in the main compartment resulting in a use-after-free after unwrapping the proxy. This vulnerability affects Firefox 110, Thunderbird 102.8, and Firefox ESR 102.8...

Design/Logic Flaw

Permission prompts for opening external schemes were only shown for ContentPrincipals resulting in extensions being able to open them without user interaction via ExpandedPrincipals. This could lead to further malicious actions such as downloading files or interacting with software already...

Code injection

Module load requests that failed were not being checked as to whether or not they were cancelled causing a use-after-free in ScriptLoadContext. This vulnerability affects Firefox 110, Thunderbird 102.8, and Firefox ESR 102.8...

Memory corruption

Mozilla developers Randell Jesup, Andrew Osmond, Sebastian Hengst, Andrew McCreight, and the Mozilla Fuzzing Team reported memory safety bugs present in Firefox 111 and Firefox ESR 102.9. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these...

Code injection

An invalid downcast from nsTextNode to SVGElement could have lead to undefined behavior. This vulnerability affects Firefox 110, Thunderbird 102.8, and Firefox ESR 102.8...

CVE-2023-23602 Content Security Policy wasn't being correctly applied to WebSockets in WebWorkers

A mishandled security check when creating a WebSocket in a WebWorker caused the Content Security Policy connect-src header to be ignored. This could lead to connections to restricted origins from inside WebWorkers. This vulnerability affects Firefox 109, Firefox ESR 102.7, and Thunderbird 102.7...

CVE-2023-23601 URL being dragged from cross-origin iframe into same tab triggers navigation

Navigations were being allowed when dragging a URL from a cross-origin iframe into the same tab which could lead to website spoofing attacks This vulnerability affects Firefox 109, Firefox ESR 102.7, and Thunderbird 102.7...

CVE-2023-23603 Calls to console.log allowed bypassing Content Security Policy via format directive

Regular expressions used to filter out forbidden properties and values from style directives in calls to console.log weren't accounting for external URLs. Data could then be potentially exfiltrated from the browser. This vulnerability affects Firefox 109, Firefox ESR 102.7, and Thunderbird 102.7...

CVE-2023-25746

CVE-2023-25746 corresponds to memory-safety bugs in Firefox ESR 102.7 and related components. The connected sources confirm this affects Firefox ESR before 102.8 and Thunderbird before 102.8, with the underlying issue described as memory corruptionthat could be exploited to run arbitrary code. Th...

CVE-2023-25737

An invalid downcast from nsTextNode to SVGElement could have lead to undefined behavior. This vulnerability affects Firefox 110, Thunderbird 102.8, and Firefox ESR 102.8...

CVE-2023-25738

Members of the DEVMODEW struct set by the printer device driver weren't being validated and could have resulted in invalid values which in turn would cause the browser to attempt out of bounds access to related variables.This bug only affects Firefox on Windows. Other operating systems are...

CVE-2023-25734

After downloading a Windows .url shortcut from the local filesystem, an attacker could supply a remote path that would lead to unexpected network requests from the operating system. This also had the potential to leak NTLM credentials to the resource.This bug only affects Firefox on Windows. Othe...

CVE-2023-23603

Regular expressions used to filter out forbidden properties and values from style directives in calls to console.log weren't accounting for external URLs. Data could then be potentially exfiltrated from the browser. This vulnerability affects Firefox 109, Firefox ESR 102.7, and Thunderbird 102.7...

CVE-2023-29536

An attacker could cause the memory manager to incorrectly free a pointer that addresses attacker-controlled memory, resulting in an assertion, memory corruption, or a potentially exploitable crash. This vulnerability affects Firefox 112, Focus for Android 112, Firefox ESR 102.10, Firefox for...

CVE-2023-25746

Memory safety bugs present in Firefox ESR 102.7. 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. This vulnerability affects Thunderbird 102.8 and Firefox ESR 102.8...

CVE-2023-25728

The Content-Security-Policy-Report-Only header could allow an attacker to leak a child iframe's unredacted URI when interaction with that iframe triggers a redirect. This vulnerability affects Firefox 110, Thunderbird 102.8, and Firefox ESR 102.8...

CVE-2023-25739

CVE-2023-25739 affects Firefox <110, Thunderbird <102.8, and Firefox ESR

CVE-2023-25742

When importing a SPKI RSA public key as ECDSA P-256, the key would be handled incorrectly causing the tab to crash. This vulnerability affects Firefox 110, Thunderbird 102.8, and Firefox ESR 102.8...

CVE-2023-29533

A website could have obscured the fullscreen notification by using a combination of window.open, fullscreen requests, window.name assignments, and setInterval calls. This could have led to user confusion and possible spoofing attacks. This vulnerability affects Firefox 112, Focus for Android 112,...