Mozilla Focus

Focus iOS <143: Link Handling Bug (Context Menu URL Load/Toolbar)
CVE-2025-10290 6.5 - Medium - September 16, 2025

Opening links via the contextual menu in Focus iOS for certain URL schemes would fail to load but would not refresh the toolbar correctly, allowing attackers to spoof websites if users were coerced into opening a link explicitly through a long-press This vulnerability affects Focus for iOS < 143.0.

User Interface (UI) Misrepresentation of Critical Information

Focus iOS <142 XSS via URL Bar Dragging JS Links
CVE-2025-55033 6.1 - Medium - August 19, 2025

Dragging JavaScript links to the URL bar in Focus for iOS could be utilized to run malicious scripts, potentially resulting in XSS attacks This vulnerability affects Focus for iOS < 142.

XSS

Focus iOS XSS via Ignored CD-Header
CVE-2025-55032 6.1 - Medium - August 19, 2025

Focus for iOS would not respect a Content-Disposition header of type Attachment and would incorrectly display the content inline, potentially allowing for XSS attacks This vulnerability affects Focus for iOS < 142.

Open Redirect

Firefox iOS FIDO Passkey Transport Exploit <142
CVE-2025-55031 9.8 - Critical - August 19, 2025

Malicious pages could use Firefox for iOS to pass FIDO: links to the OS and trigger the hybrid passkey transport. An attacker within Bluetooth range could have used this to trick the user into using their passkey to log the attacker's computer into the target account. This vulnerability affects Firefox for iOS < 142 and Focus for iOS < 142.

Open Redirect

Firefox WebExtension jar:file URI Leak (CVE-2023-29538)
CVE-2023-29538 4.3 - Medium - June 02, 2023

Under specific circumstances a WebExtension may have received a <code>jar:file:///</code> URI instead of a <code>moz-extension:///</code> URI during a load request. This leaked directory paths on the user's machine. This vulnerability affects Firefox for Android < 112, Firefox < 112, and Focus for Android < 112.

Exposure of Resource to Wrong Sphere

Firefox <112 Fullscreen Notification Spoofing via window.open
CVE-2023-29533 4.3 - Medium - June 02, 2023

A website could have obscured the fullscreen notification by using a combination of <code>window.open</code>, fullscreen requests, <code>window.name</code> assignments, and <code>setInterval</code> calls. This could have led to user confusion and possible spoofing attacks. This vulnerability affects Firefox < 112, Focus for Android < 112, Firefox ESR < 102.10, Firefox for Android < 112, and Thunderbird < 102.10.

Firefox GC WeakMap Access Before Trace (v < 112, ESR < 102.10, Thunderbird < 102.10)
CVE-2023-29535 6.5 - Medium - June 02, 2023

Following a Garbage Collector compaction, weak maps may have been accessed before they were correctly traced. This resulted in memory corruption and a potentially exploitable crash. This vulnerability affects Firefox < 112, Focus for Android < 112, Firefox ESR < 102.10, Firefox for Android < 112, and Thunderbird < 102.10.

Mozilla Firefox Memory Manager Crash Vulnerability < v112
CVE-2023-29536 8.8 - High - June 02, 2023

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 Android < 112, and Thunderbird < 102.10.

Dangling pointer

CVE-2023-29537: Race Conditions in Firefox Font Init Enable RCE
CVE-2023-29537 7.5 - High - June 02, 2023

Multiple race conditions in the font initialization could have led to memory corruption and execution of attacker-controlled code. This vulnerability affects Firefox for Android < 112, Firefox < 112, and Focus for Android < 112.

Race Condition

Memory Safety Bugs in Mozilla Firefox < 112 Allowing Arbitrary Execution
CVE-2023-29551 8.8 - High - June 02, 2023

Memory safety bugs present in Firefox 111. 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 Firefox for Android < 112, Firefox < 112, and Focus for Android < 112.

Memory Corruption

Firefox <112 ESR<102.10 Reflected Download via NULL Filename Truncation
CVE-2023-29539 8.8 - High - June 02, 2023

When handling the filename directive in the Content-Disposition header, the filename would be truncated if the filename contained a NULL character. This could have led to reflected file download attacks potentially tricking users to install malware. This vulnerability affects Firefox < 112, Focus for Android < 112, Firefox ESR < 102.10, Firefox for Android < 112, and Thunderbird < 102.10.

NULL Pointer Dereference

Firefox Android Redirect via sourceMappingUrls Enables External Protocol
CVE-2023-29540 6.1 - Medium - June 02, 2023

Using a redirect embedded into <code>sourceMappingUrls</code> could allow for navigation to external protocol links in sandboxed iframes without <code>allow-top-navigation-to-custom-protocols</code>. This vulnerability affects Firefox for Android < 112, Firefox < 112, and Focus for Android < 112.

Open Redirect

Firefox <112 Desktop File Command Injection on Linux
CVE-2023-29541 8.8 - High - June 02, 2023

Firefox did not properly handle downloads of files ending in <code>.desktop</code>, which can be interpreted to run attacker-controlled commands. <br>*This bug only affects Firefox for Linux on certain Distributions. Other operating systems are unaffected, and Mozilla is unable to enumerate all affected Linux Distributions.*. This vulnerability affects Firefox < 112, Focus for Android < 112, Firefox ESR < 102.10, Firefox for Android < 112, and Thunderbird < 102.10.

Output Sanitization

Firefox UAF in Debugger Vector (Android & Desktop)
CVE-2023-29543 8.8 - High - June 02, 2023

An attacker could have caused memory corruption and a potentially exploitable use-after-free of a pointer in a global object's debugger vector. This vulnerability affects Firefox for Android < 112, Firefox < 112, and Focus for Android < 112.

Dangling pointer

Firefox <112 GC Memory Corruption Crash
CVE-2023-29544 6.5 - Medium - June 02, 2023

If multiple instances of resource exhaustion occurred at the incorrect time, the garbage collector could have caused memory corruption and a potentially exploitable crash. This vulnerability affects Firefox for Android < 112, Firefox < 112, and Focus for Android < 112.

Resource Exhaustion

Firefox Cookie Jar Desync via Insecure Cookie Creation (CVE-2023-29547)
CVE-2023-29547 6.5 - Medium - June 02, 2023

When a secure cookie existed in the Firefox cookie jar an insecure cookie for the same domain could have been created, when it should have silently failed. This could have led to a desynchronization in expected results when reading from the secure cookie. This vulnerability affects Firefox for Android < 112, Firefox < 112, and Focus for Android < 112.

Mozilla Firefox <112 Ion Compiler Wrong Optimization (CVE-2023-29548)
CVE-2023-29548 6.5 - Medium - June 02, 2023

A wrong lowering instruction in the ARM64 Ion compiler resulted in a wrong optimization result. This vulnerability affects Firefox < 112, Focus for Android < 112, Firefox ESR < 102.10, Firefox for Android < 112, and Thunderbird < 102.10.

Moz Firefox bind() realm flaw could disrupt JS SES sandbox
CVE-2023-29549 6.5 - Medium - June 02, 2023

Under certain circumstances, a call to the <code>bind</code> function may have resulted in the incorrect realm. This may have created a vulnerability relating to JavaScript-implemented sandboxes such as SES. This vulnerability affects Firefox for Android < 112, Firefox < 112, and Focus for Android < 112.

Inadequate Encryption Strength

Firefox 111 & ESR 102.9 Memory Corruption Arbitrary Code (Pre-112)
CVE-2023-29550 8.8 - High - June 02, 2023

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 could have been exploited to run arbitrary code. This vulnerability affects Firefox < 112, Focus for Android < 112, Firefox ESR < 102.10, Firefox for Android < 112, and Thunderbird < 102.10.

Firefox <97 + ESR <91.6.1 - XSLT Param Removal UAF
CVE-2022-26485 8.8 - High - December 22, 2022

Removing an XSLT parameter during processing could have lead to an exploitable use-after-free. We have had reports of attacks in the wild abusing this flaw. This vulnerability affects Firefox < 97.0.2, Firefox ESR < 91.6.1, Firefox for Android < 97.3.0, Thunderbird < 91.6.2, and Focus < 97.3.0.

Dangling pointer

Firefox <97.0.2: WebGPU IPC UAF Sandbox Escape
CVE-2022-26486 9.6 - Critical - December 22, 2022

An unexpected message in the WebGPU IPC framework could lead to a use-after-free and exploitable sandbox escape. We have had reports of attacks in the wild abusing this flaw. This vulnerability affects Firefox < 97.0.2, Firefox ESR < 91.6.1, Firefox for Android < 97.3.0, Thunderbird < 91.6.2, and Focus < 97.3.0.

Dangling pointer