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firefox-esr vulnerabilities · Page 32

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

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Vulnerabilities: 1358

  1. CVE-2025-1931

    High · CVSS 7.5EPSS 0.54%Fix available

    Use-after-free in WebTransportChild

    It was possible to cause a use-after-free in the content process side of a WebTransport connection, leading to a potentially exploitable crash. This vulnerability was fixed in Firefox 136, Firefox ESR 115.21, Firefox ESR 128.8, Thunderbird 136, and Thunderbird 128.8.

    • Update to 128.8.0esr-1
    Published Updated
  2. CVE-2025-1017

    Critical · CVSS 9.8EPSS 0.58%Fix available

    Memory safety bugs fixed in Firefox 135, Thunderbird 135, Firefox ESR 128.7, and Thunderbird 128.7

    Memory safety bugs present in Firefox 134, Thunderbird 134, Firefox ESR 128.6, and Thunderbird 128.6. 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 135, Firefox ESR 128.7, Thunderbird 128.7, and Thunderbird 135.

    • Update to 128.7.0esr-1
    Published Updated
  3. CVE-2025-1016

    Critical · CVSS 9.8EPSS 0.59%Fix available

    Memory safety bugs fixed in Firefox 135, Thunderbird 135, Firefox ESR 115.20, Firefox ESR 128.7, Thunderbird 115.20, and Thunderbird 128.7

    Memory safety bugs present in Firefox 134, Thunderbird 134, Firefox ESR 115.19, Firefox ESR 128.6, Thunderbird 115.19, and Thunderbird 128.6. 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 135, Firefox ESR 115.20, Firefox ESR 128.7, Thunderbird 128.7, and Thunderbird 135.

    • Update to 128.7.0esr-1
    Published Updated
  4. CVE-2025-1013

    Medium · CVSS 6.5EPSS 0.33%Fix available

    Potential opening of private browsing tabs in normal browsing windows

    A race condition could have led to private browsing tabs being opened in normal browsing windows. This could have resulted in a potential privacy leak. This vulnerability was fixed in Firefox 135, Firefox ESR 128.7, Thunderbird 128.7, and Thunderbird 135.

    • Update to 128.7.0esr-1
    Published Updated
  5. CVE-2025-1011

    Critical · CVSS 9.8EPSS 0.63%Fix available

    A bug in WebAssembly code generation could result in a crash

    A bug in WebAssembly code generation could have lead to a crash. It may have been possible for an attacker to leverage this to achieve code execution. This vulnerability was fixed in Firefox 135, Firefox ESR 128.7, Thunderbird 128.7, and Thunderbird 135.

    • Update to 128.7.0esr-1
    Published Updated
  6. 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 128.6.0esr-1
    Published Updated
  7. 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 128.6.0esr-1
    Published Updated
  8. 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 128.6.0esr-1
    Published Updated
  9. 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 128.6.0esr-1
    Published Updated
  10. 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 128.6.0esr-1
    Published Updated
  11. 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 128.5.0esr-1
    Published Updated
  12. 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 128.7.0esr-1
    Published Updated
  13. 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 128.5.0esr-1
    Published Updated

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