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firefox vulnerabilities · Page 2

Vulnerabilities published for firefox in the last 30 days: 0. Listed in the KEV catalogue: 0.

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Vulnerabilities: 714

  1. CVE-2025-1010

    Critical · CVSS 9.8EPSS 0.46%Fix available

    Use-after-free in Custom Highlight

    An attacker could have caused a use-after-free via the Custom Highlight API, leading to a potentially exploitable crash. This vulnerability was fixed in Firefox 135, Firefox ESR 115.20, Firefox ESR 128.7, Thunderbird 128.7, and Thunderbird 135.

    • Update to 135.0+build2-0ubuntu0.20.04.1
    Published Updated
  2. CVE-2025-0247

    Critical · CVSS 9.8EPSS 10.61%Fix available

    Memory safety bugs fixed in Firefox 134 and Thunderbird 134

    Memory safety bugs present in Firefox 133 and Thunderbird 133. 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 was fixed in Firefox 134 and Thunderbird 134.

    • Update to 134.0+build1-0ubuntu0.20.04.1
    Published Updated
  3. CVE-2025-0243

    Medium · CVSS 5.1EPSS 0.25%Fix available

    Memory safety bugs fixed in Firefox 134, Thunderbird 134, Firefox ESR 128.6, and Thunderbird 128.6

    Memory safety bugs present in Firefox 133, Thunderbird 133, Firefox ESR 128.5, and Thunderbird 128.5. 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 was fixed in Firefox 134, Firefox ESR 128.6, Thunderbird 134, and Thunderbird 128.6.

    • Update to 134.0+build1-0ubuntu0.20.04.1
    Published Updated
  4. CVE-2025-0242

    Medium · CVSS 6.5EPSS 14.72%Fix available

    Memory safety bugs fixed in Firefox 134, Thunderbird 134, Firefox ESR 115.19, Firefox ESR 128.6, Thunderbird 115.19, and Thunderbird 128.6

    Memory safety bugs present in Firefox 133, Thunderbird 133, Firefox ESR 115.18, Firefox ESR 128.5, Thunderbird 115.18, and Thunderbird 128.5. 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 was fixed in Firefox 134, Firefox ESR 128.6, Firefox ESR 115.19, Thunderbird 134, and Thunderbird 128.6.

    • Update to 134.0+build1-0ubuntu0.20.04.1
    Published Updated
  5. CVE-2025-0241

    High · CVSS 7.7EPSS 0.73%Fix available

    Memory corruption when using JavaScript Text Segmentation

    When segmenting specially crafted text, segmentation would corrupt memory leading to a potentially exploitable crash. This vulnerability was fixed in Firefox 134, Firefox ESR 128.6, Thunderbird 134, and Thunderbird 128.6.

    • Update to 134.0+build1-0ubuntu0.20.04.1
    Published Updated
  6. CVE-2025-0240

    Medium · CVSS 4EPSS 0.67%Fix available

    Compartment mismatch when parsing JavaScript JSON module

    Parsing a JavaScript module as JSON could, under some circumstances, cause cross-compartment access, which may result in a use-after-free. This vulnerability was fixed in Firefox 134, Firefox ESR 128.6, Thunderbird 134, and Thunderbird 128.6.

    • Update to 134.0+build1-0ubuntu0.20.04.1
    Published Updated
  7. CVE-2025-0239

    Medium · CVSS 4EPSS 0.23%Fix available

    Alt-Svc ALPN validation failure when redirected

    When using Alt-Svc, ALPN did not properly validate certificates when the original server is redirecting to an insecure site. This vulnerability was fixed in Firefox 134, Firefox ESR 128.6, Thunderbird 134, and Thunderbird 128.6.

    • Update to 134.0+build1-0ubuntu0.20.04.1
    Published Updated
  8. CVE-2025-0238

    Medium · CVSS 5.3EPSS 0.79%Fix available

    Use-after-free when breaking lines in text

    Assuming a controlled failed memory allocation, an attacker could have caused a use-after-free, leading to a potentially exploitable crash. This vulnerability was fixed in Firefox 134, Firefox ESR 128.6, Firefox ESR 115.19, Thunderbird 134, and Thunderbird 128.6.

    • Update to 134.0+build1-0ubuntu0.20.04.1
    Published Updated
  9. CVE-2025-0237

    Medium · CVSS 5.4EPSS 0.6%Fix available

    WebChannel APIs susceptible to confused deputy attack

    The WebChannel API, which is used to transport various information across processes, did not check the sending principal but rather accepted the principal being sent. This could have led to privilege escalation attacks. This vulnerability was fixed in Firefox 134, Firefox ESR 128.6, Thunderbird 134, and Thunderbird 128.6.

    • Update to 134.0+build1-0ubuntu0.20.04.1
    Published Updated
  10. CVE-2024-11699

    High · CVSS 8.8EPSS 0.68%Fix available

    CVE-2024-11699

    Memory safety bugs present in Firefox 132, Firefox ESR 128.4, and Thunderbird 128.4. 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 < 133, Firefox ESR < 128.5, Thunderbird < 133, and Thunderbird < 128.5.

    • Update to 133.0+build2-0ubuntu0.20.04.1
    Published Updated
  11. CVE-2024-11706

    Medium · CVSS 6.5EPSS 0.47%Fix available

    CVE-2024-11706

    A null pointer dereference may have inadvertently occurred in `pk12util`, and specifically in the `SEC_ASN1DecodeItem_Util` function, when handling malformed or improperly formatted input files. This vulnerability affects Firefox < 133 and Thunderbird < 133.

    • Update to 133.0+build2-0ubuntu0.20.04.1
    Published Updated
  12. CVE-2024-11705

    Critical · CVSS 9.1EPSS 0.66%Fix available

    CVE-2024-11705

    `NSC_DeriveKey` inadvertently assumed that the `phKey` parameter is always non-NULL. When it was passed as NULL, a segmentation fault (SEGV) occurred, leading to crashes. This behavior conflicted with the PKCS#11 v3.0 specification, which allows `phKey` to be NULL for certain mechanisms. This vulnerability affects Firefox < 133 and Thunderbird < 133.

    • Update to 133.0+build2-0ubuntu0.20.04.1
    Published Updated
  13. CVE-2024-11704

    Critical · CVSS 9.8EPSS 0.91%Fix available

    CVE-2024-11704

    A double-free issue could have occurred in `sec_pkcs7_decoder_start_decrypt()` when handling an error path. Under specific conditions, the same symmetric key could have been freed twice, potentially leading to memory corruption. This vulnerability affects Firefox < 133, Thunderbird < 133, Firefox ESR < 128.7, and Thunderbird < 128.7.

    • Update to 133.0+build2-0ubuntu0.20.04.1
    Published Updated
  14. CVE-2024-11697

    High · CVSS 8.8EPSS 0.76%Fix available

    CVE-2024-11697

    When handling keypress events, an attacker may have been able to trick a user into bypassing the "Open Executable File?" confirmation dialog. This could have led to malicious code execution. This vulnerability affects Firefox < 133, Firefox ESR < 128.5, Thunderbird < 133, and Thunderbird < 128.5.

    • Update to 133.0+build2-0ubuntu0.20.04.1
    Published Updated
  15. CVE-2024-11696

    Medium · CVSS 5.4EPSS 0.34%Fix available

    CVE-2024-11696

    The application failed to account for exceptions thrown by the `loadManifestFromFile` method during add-on signature verification. This flaw, triggered by an invalid or unsupported extension manifest, could have caused runtime errors that disrupted the signature validation process. As a result, the enforcement of signature validation for unrelated add-ons may have been bypassed. Signature validation in this context is used to ensure that third-party applications on the user's computer have not tampered with the user's extensions, limiting the impact of this issue. This vulnerability affects Firefox < 133, Firefox ESR < 128.5, Thunderbird < 1

    • Update to 133.0+build2-0ubuntu0.20.04.1
    Published Updated
  16. CVE-2024-11695

    Medium · CVSS 5.4EPSS 0.43%Fix available

    CVE-2024-11695

    A crafted URL containing Arabic script and whitespace characters could have hidden the true origin of the page, resulting in a potential spoofing attack. This vulnerability affects Firefox < 133, Firefox ESR < 128.5, Thunderbird < 133, and Thunderbird < 128.5.

    • Update to 133.0+build2-0ubuntu0.20.04.1
    Published Updated
  17. CVE-2024-11694

    Medium · CVSS 6.1EPSS 0.49%Fix available

    CVE-2024-11694

    Enhanced Tracking Protection's Strict mode may have inadvertently allowed a CSP `frame-src` bypass and DOM-based XSS through the Google SafeFrame shim in the Web Compatibility extension. This issue could have exposed users to malicious frames masquerading as legitimate content. This vulnerability affects Firefox < 133, Firefox ESR < 128.5, Firefox ESR < 115.18, Thunderbird < 133, Thunderbird < 128.5, and Thunderbird < 115.18.

    • Update to 133.0+build2-0ubuntu0.20.04.1
    Published Updated

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