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Vuln ID | Summary | CVSS Severity |
---|---|---|
CVE-2025-6436 |
Memory safety bugs present in Firefox 139 and Thunderbird 139. 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 < 140 and Thunderbird < 140. Published: June 24, 2025; 9:15:24 AM -0400 |
V4.0:(not available) V3.x:(not available) V2.0:(not available) |
CVE-2025-6435 |
If a user saved a response from the Network tab in Devtools using the Save As context menu option, that file may not have been saved with the `.download` file extension. This could have led to the user inadvertently running a malicious executable. This vulnerability affects Firefox < 140 and Thunderbird < 140. Published: June 24, 2025; 9:15:24 AM -0400 |
V4.0:(not available) V3.x:(not available) V2.0:(not available) |
CVE-2025-6434 |
The exception page for the HTTPS-Only feature, displayed when a website is opened via HTTP, lacked an anti-clickjacking delay, potentially allowing an attacker to trick a user into granting an exception and loading a webpage over HTTP. This vulnerability affects Firefox < 140 and Thunderbird < 140. Published: June 24, 2025; 9:15:24 AM -0400 |
V4.0:(not available) V3.x:(not available) V2.0:(not available) |
CVE-2025-6433 |
If a user visited a webpage with an invalid TLS certificate, and granted an exception, the webpage was able to provide a WebAuthn challenge that the user would be prompted to complete. This is in violation of the WebAuthN spec which requires "a secure transport established without errors". This vulnerability affects Firefox < 140 and Thunderbird < 140. Published: June 24, 2025; 9:15:24 AM -0400 |
V4.0:(not available) V3.x:(not available) V2.0:(not available) |
CVE-2025-6432 |
When Multi-Account Containers was enabled, DNS requests could have bypassed a SOCKS proxy when the domain name was invalid or the SOCKS proxy was not responding. This vulnerability affects Firefox < 140 and Thunderbird < 140. Published: June 24, 2025; 9:15:24 AM -0400 |
V4.0:(not available) V3.x:(not available) V2.0:(not available) |
CVE-2025-6431 |
When a link can be opened in an external application, Firefox for Android will, by default, prompt the user before doing so. An attacker could have bypassed this prompt, potentially exposing the user to security vulnerabilities or privacy leaks in external applications. *This bug only affects Firefox for Android. Other versions of Firefox are unaffected.* This vulnerability affects Firefox < 140. Published: June 24, 2025; 9:15:24 AM -0400 |
V4.0:(not available) V3.x:(not available) V2.0:(not available) |
CVE-2025-6430 |
When a file download is specified via the `Content-Disposition` header, that directive would be ignored if the file was included via a `<embed>` or `<object>` tag, potentially making a website vulnerable to a cross-site scripting attack. This vulnerability affects Firefox < 140, Firefox ESR < 128.12, Thunderbird < 140, and Thunderbird < 128.12. Published: June 24, 2025; 9:15:23 AM -0400 |
V4.0:(not available) V3.x:(not available) V2.0:(not available) |
CVE-2025-6429 |
Firefox could have incorrectly parsed a URL and rewritten it to the youtube.com domain when parsing the URL specified in an `embed` tag. This could have bypassed website security checks that restricted which domains users were allowed to embed. This vulnerability affects Firefox < 140, Firefox ESR < 128.12, Thunderbird < 140, and Thunderbird < 128.12. Published: June 24, 2025; 9:15:23 AM -0400 |
V4.0:(not available) V3.x:(not available) V2.0:(not available) |
CVE-2025-6428 |
When a URL was provided in a link querystring parameter, Firefox for Android would follow that URL instead of the correct URL, potentially leading to phishing attacks. *This bug only affects Firefox for Android. Other versions of Firefox are unaffected.* This vulnerability affects Firefox < 140. Published: June 24, 2025; 9:15:23 AM -0400 |
V4.0:(not available) V3.x:(not available) V2.0:(not available) |
CVE-2025-6427 |
An attacker was able to bypass the `connect-src` directive of a Content Security Policy by manipulating subdocuments. This would have also hidden the connections from the Network tab in Devtools. This vulnerability affects Firefox < 140 and Thunderbird < 140. Published: June 24, 2025; 9:15:23 AM -0400 |
V4.0:(not available) V3.x:(not available) V2.0:(not available) |
CVE-2025-6426 |
The executable file warning did not warn users before opening files with the `terminal` extension. *This bug only affects Firefox for macOS. Other versions of Firefox are unaffected.* This vulnerability affects Firefox < 140, Firefox ESR < 128.12, Thunderbird < 140, and Thunderbird < 128.12. Published: June 24, 2025; 9:15:23 AM -0400 |
V4.0:(not available) V3.x:(not available) V2.0:(not available) |
CVE-2025-6425 |
An attacker who enumerated resources from the WebCompat extension could have obtained a persistent UUID that identified the browser, and persisted between containers and normal/private browsing mode, but not profiles. This vulnerability affects Firefox < 140, Firefox ESR < 115.25, Firefox ESR < 128.12, Thunderbird < 140, and Thunderbird < 128.12. Published: June 24, 2025; 9:15:23 AM -0400 |
V4.0:(not available) V3.x:(not available) V2.0:(not available) |
CVE-2025-6424 |
A use-after-free in FontFaceSet resulted in a potentially exploitable crash. This vulnerability affects Firefox < 140, Firefox ESR < 115.25, Firefox ESR < 128.12, Thunderbird < 140, and Thunderbird < 128.12. Published: June 24, 2025; 9:15:23 AM -0400 |
V4.0:(not available) V3.x:(not available) V2.0:(not available) |
CVE-2025-49710 |
An integer overflow was present in `OrderedHashTable` used by the JavaScript engine This vulnerability affects Firefox < 139.0.4. Published: June 11, 2025; 8:15:27 AM -0400 |
V4.0:(not available) V3.x:(not available) V2.0:(not available) |
CVE-2025-49709 |
Certain canvas operations could have lead to memory corruption. This vulnerability affects Firefox < 139.0.4. Published: June 11, 2025; 8:15:26 AM -0400 |
V4.0:(not available) V3.x:(not available) V2.0:(not available) |
CVE-2025-5272 |
Memory safety bugs present in Firefox 138 and Thunderbird 138. 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 < 139 and Thunderbird < 139. Published: May 27, 2025; 9:15:23 AM -0400 |
V4.0:(not available) V3.x:(not available) V2.0:(not available) |
CVE-2025-5271 |
Previewing a response in Devtools ignored CSP headers, which could have allowed content injection attacks. This vulnerability affects Firefox < 139 and Thunderbird < 139. Published: May 27, 2025; 9:15:22 AM -0400 |
V4.0:(not available) V3.x:(not available) V2.0:(not available) |
CVE-2025-5270 |
In certain cases, SNI could have been sent unencrypted even when encrypted DNS was enabled. This vulnerability affects Firefox < 139 and Thunderbird < 139. Published: May 27, 2025; 9:15:22 AM -0400 |
V4.0:(not available) V3.x:(not available) V2.0:(not available) |
CVE-2025-5268 |
Memory safety bugs present in Firefox 138, Thunderbird 138, Firefox ESR 128.10, and Thunderbird 128.10. 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 < 139, Firefox ESR < 128.11, Thunderbird < 139, and Thunderbird < 128.11. Published: May 27, 2025; 9:15:22 AM -0400 |
V4.0:(not available) V3.x:(not available) V2.0:(not available) |
CVE-2025-5267 |
A clickjacking vulnerability could have been used to trick a user into leaking saved payment card details to a malicious page. This vulnerability affects Firefox < 139, Firefox ESR < 128.11, Thunderbird < 139, and Thunderbird < 128.11. Published: May 27, 2025; 9:15:22 AM -0400 |
V4.0:(not available) V3.x:(not available) V2.0:(not available) |