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firefox-esr vulnerabilities · Page 30

Vulnerabilities published for firefox-esr in the last 30 days: 206. Listed in the KEV catalogue: 0.

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Vulnerabilities: 1349

  1. CVE-2025-8030

    High · CVSS 8.1EPSS 0.38%Fix available

    Potential user-assisted code execution in “Copy as cURL” command

    Insufficient escaping in the “Copy as cURL” feature could potentially be used to trick a user into executing unexpected code. This vulnerability was fixed in Firefox 141, Firefox ESR 128.13, Firefox ESR 140.1, Thunderbird 141, Thunderbird 128.13, and Thunderbird 140.1.

    • Update to 128.13.0esr-1
    Published Updated
  2. CVE-2025-8028

    Critical · CVSS 9.8EPSS 0.58%Fix available

    Large branch table could lead to truncated instruction

    On arm64, a WASM `br_table` instruction with a lot of entries could lead to the label being too far from the instruction causing truncation and incorrect computation of the branch address. This vulnerability was fixed in Firefox 141, Firefox ESR 115.26, Firefox ESR 128.13, Firefox ESR 140.1, Thunderbird 141, Thunderbird 128.13, and Thunderbird 140.1.

    • Update to 128.13.0esr-1
    Published Updated
  3. CVE-2025-8027

    Medium · CVSS 6.5EPSS 0.43%Fix available

    JavaScript engine only wrote partial return value to stack

    On 64-bit platforms IonMonkey-JIT only wrote 32 bits of the 64-bit return value space on the stack. Baseline-JIT, however, read the entire 64 bits. This vulnerability was fixed in Firefox 141, Firefox ESR 115.26, Firefox ESR 128.13, Firefox ESR 140.1, Thunderbird 141, Thunderbird 128.13, and Thunderbird 140.1.

    • Update to 128.13.0esr-1
    Published Updated
  4. CVE-2025-6430

    Medium · CVSS 6.1EPSS 0.27%Fix available

    Content-Disposition header ignored when a file is included in an embed or object tag

    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 was fixed in Firefox 140, Firefox ESR 128.12, Thunderbird 140, and Thunderbird 128.12.

    • Update to 128.12.0esr-1
    Published Updated
  5. CVE-2025-6429

    Medium · CVSS 6.5EPSS 0.36%Fix available

    Incorrect parsing of URLs could have allowed embedding of youtube.com

    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 was fixed in Firefox 140, Firefox ESR 128.12, Thunderbird 140, and Thunderbird 128.12.

    • Update to 128.12.0esr-1
    Published Updated
  6. CVE-2025-6425

    Medium · CVSS 4.3EPSS 0.31%Fix available

    The WebCompat WebExtension shipped with Firefox exposed a persistent UUID

    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 was fixed in Firefox 140, Firefox ESR 115.25, Firefox ESR 128.12, Thunderbird 140, and Thunderbird 128.12.

    • Update to 128.12.0esr-1
    Published Updated
  7. CVE-2025-5269

    High · CVSS 8.1EPSS 0.48%Fix available

    Memory safety bug fixed in Firefox ESR 128.11 and Thunderbird 128.11

    Memory safety bug present in Firefox ESR 128.10, and Thunderbird 128.10. This bug showed evidence of memory corruption and we presume that with enough effort this could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox ESR 128.11 and Thunderbird 128.11.

    • Update to 128.11.0esr-1
    Published Updated
  8. CVE-2025-5268

    High · CVSS 8.1EPSS 0.51%Fix available

    Memory safety bugs fixed in Firefox 139, Thunderbird 139, Firefox ESR 128.11, and Thunderbird 128.11

    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 was fixed in Firefox 139, Firefox ESR 128.11, Thunderbird 139, and Thunderbird 128.11.

    • Update to 128.11.0esr-1
    Published Updated
  9. CVE-2025-5267

    Medium · CVSS 5.4EPSS 0.28%Fix available

    Clickjacking vulnerability could have led to leaking saved payment card details

    A clickjacking vulnerability could have been used to trick a user into leaking saved payment card details to a malicious page. This vulnerability was fixed in Firefox 139, Firefox ESR 128.11, Thunderbird 139, and Thunderbird 128.11.

    • Update to 128.11.0esr-1
    Published Updated
  10. CVE-2025-5266

    Medium · CVSS 4.3EPSS 0.34%Fix available

    Script element events leaked cross-origin resource status

    Script elements loading cross-origin resources generated load and error events which leaked information enabling XS-Leaks attacks. This vulnerability was fixed in Firefox 139, Firefox ESR 128.11, Thunderbird 139, and Thunderbird 128.11.

    • Update to 128.11.0esr-1
    Published Updated
  11. CVE-2025-5264

    Medium · CVSS 4.8EPSS 0.3%Fix available

    Potential local code execution in “Copy as cURL” command

    Due to insufficient escaping of the newline character in the “Copy as cURL” feature, an attacker could trick a user into using this command, potentially leading to local code execution on the user's system. This vulnerability was fixed in Firefox 139, Firefox ESR 115.24, Firefox ESR 128.11, Thunderbird 139, and Thunderbird 128.11.

    • Update to 128.11.0esr-1
    Published Updated
  12. CVE-2025-5263

    Medium · CVSS 4.3EPSS 0.27%Fix available

    Error handling for script execution was incorrectly isolated from web content

    Error handling for script execution was incorrectly isolated from web content, which could have allowed cross-origin leak attacks. This vulnerability was fixed in Firefox 139, Firefox ESR 115.24, Firefox ESR 128.11, Thunderbird 139, and Thunderbird 128.11.

    • Update to 128.11.0esr-1
    Published Updated
  13. CVE-2025-4919

    High · CVSS 8.8EPSS 9.12%Fix available

    Out-of-bounds access when optimizing linear sums

    An attacker was able to perform an out-of-bounds read or write on a JavaScript object by confusing array index sizes. This vulnerability was fixed in Firefox 138.0.4, Firefox ESR 128.10.1, Firefox ESR 115.23.1, Thunderbird 128.10.2, and Thunderbird 138.0.2.

    • Update to 128.10.1esr-1
    Published Updated
  14. CVE-2025-4918

    Critical · CVSS 9.8EPSS 9.52%Fix available

    Out-of-bounds access when resolving Promise objects

    An attacker was able to perform an out-of-bounds read or write on a JavaScript `Promise` object. This vulnerability was fixed in Firefox 138.0.4, Firefox ESR 128.10.1, Firefox ESR 115.23.1, Thunderbird 128.10.2, and Thunderbird 138.0.2.

    • Update to 128.10.1esr-1
    Published Updated
  15. CVE-2025-4093

    High · CVSS 8.1EPSS 0.49%Fix available

    Memory safety bug fixed in Firefox ESR 128.10 and Thunderbird 128.10

    Memory safety bug present in Firefox ESR 128.9, and Thunderbird 128.9. This bug showed evidence of memory corruption and we presume that with enough effort this could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox ESR 128.10 and Thunderbird 128.10.

    • Update to 128.10.0esr-1
    Published Updated
  16. CVE-2025-4091

    High · CVSS 8.1EPSS 0.51%Fix available

    Memory safety bugs fixed in Firefox 138, Thunderbird 138, Firefox ESR 128.10, and Thunderbird 128.10

    Memory safety bugs present in Firefox 137, Thunderbird 137, Firefox ESR 128.9, and Thunderbird 128.9. 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 was fixed in Firefox 138, Firefox ESR 128.10, Thunderbird 138, and Thunderbird 128.10.

    • Update to 128.10.0esr-1
    Published Updated
  17. CVE-2025-4087

    Medium · CVSS 4.8EPSS 0.32%Fix available

    Unsafe attribute access during XPath parsing

    A vulnerability was identified in Thunderbird where XPath parsing could trigger undefined behavior due to missing null checks during attribute access. This could lead to out-of-bounds read access and potentially, memory corruption. This vulnerability was fixed in Firefox 138, Firefox ESR 128.10, Thunderbird 138, and Thunderbird 128.10.

    • Update to 128.10.0esr-1
    Published Updated

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