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firefox-esr vulnerabilities · Page 31

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

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Vulnerabilities: 1382

  1. 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~deb12u1
    Published Updated
  2. 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~deb12u1
    Published Updated
  3. 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~deb12u1
    Published Updated
  4. 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~deb12u1
    Published Updated
  5. 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~deb12u1
    Published Updated
  6. 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~deb12u1
    Published Updated
  7. 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~deb12u1
    Published Updated
  8. 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~deb12u1
    Published Updated
  9. 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~deb12u1
    Published Updated
  10. 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~deb12u1
    Published Updated
  11. 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~deb12u1
    Published Updated
  12. CVE-2025-4083

    Critical · CVSS 9.1EPSS 0.46%Fix available

    Process isolation bypass using "javascript:" URI links in cross-origin frames

    A process isolation vulnerability in Thunderbird stemmed from improper handling of javascript: URIs, which could allow content to execute in the top-level document's process instead of the intended frame, potentially enabling a sandbox escape. This vulnerability was fixed in Firefox 138, Firefox ESR 128.10, Firefox ESR 115.23, Thunderbird 138, and Thunderbird 128.10.

    • Update to 128.10.0esr-1~deb12u1
    Published Updated
  13. CVE-2025-3030

    High · CVSS 8.1EPSS 0.51%Fix available

    Memory safety bugs fixed in Firefox 137, Thunderbird 137, Firefox ESR 128.9, and Thunderbird 128.9

    Memory safety bugs present in Firefox 136, Thunderbird 136, Firefox ESR 128.8, and Thunderbird 128.8. 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 137, Firefox ESR 128.9, Thunderbird 137, and Thunderbird 128.9.

    • Update to 128.9.0esr-1~deb12u1
    Published Updated
  14. CVE-2025-3029

    High · CVSS 7.3EPSS 0.36%Fix available

    URL Bar Spoofing via non-BMP Unicode characters

    A crafted URL containing specific Unicode characters could have hidden the true origin of the page, resulting in a potential spoofing attack. This vulnerability was fixed in Firefox 137, Firefox ESR 128.9, Thunderbird 137, and Thunderbird 128.9.

    • Update to 128.9.0esr-1~deb12u1
    Published Updated

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