Skip to content
OpenAdvisories
High WID-SEC-2025-0026 11 CVEs

Mozilla Firefox, Firefox ESR und Thunderbird: Mehrere Schwachstellen

Published Jan 7, 2025 · Updated Feb 2, 2026 · Revision 17 · de-DE

Vendor: amazon Vendor: Debian Vendor: Fedora Vendor: gentoo Vendor: IGEL Vendor: Mozilla Vendor: Oracle Vendor: Red Hat Vendor: RESF Vendor: SUSE Vendor: Ubuntu Vendor: Xerox Product: Enterprise Linux Product: Firefox Product: Firefox ESR Product: FreeFlow Print Server Product: Linux Product: Linux Product: Linux Product: Linux Product: Linux Product: Linux Product: Linux 2 Product: openSUSE Product: OS Product: Rocky Linux Product: Thunderbird Platform: Windows

Summary

Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in Mozilla Firefox, Firefox ESR und Thunderbird ausnutzen, um seine Privilegien zu erhöhen, beliebigen Code auszuführen, vertrauliche Informationen preiszugeben, Sicherheitsmaßnahmen zu umgehen oder Spoofing-Angriffe durchzuführen.

Product

Firefox ist ein Open Source Web Browser.
ESR ist die Variante mit verlängertem Support.
Thunderbird ist ein Open Source E-Mail Client.

Vulnerabilities 11

  • Critical 9.8
    CVE-2025-0247 EPSS 11%

    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 Firefo…

    Mozilla Firefox Thunderbird thunderbird Browsers Ubuntu Wolfi
  • High 7.7
    CVE-2025-0241

    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.

    Mozilla Firefox Thunderbird thunderbird Browsers Debian Ubuntu Wolfi
  • Medium 6.5
    CVE-2025-0242 EPSS 15%

    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 ha…

    Mozilla Firefox Thunderbird thunderbird Browsers Debian Ubuntu Wolfi
  • Medium 6.5
    CVE-2025-0246

    Address bar spoofing using an invalid protocol scheme on Firefox for Android

    When using an invalid protocol scheme, an attacker could spoof the address bar. *Note: This issue only affected Android operating systems. Other operating systems are unaffected.* *Note: This issue is a different issue from CVE-2025-0244. This vulnerability w…

    Mozilla Firefox firefox Browsers Wolfi
  • Medium 5.4
    CVE-2025-0237

    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…

    Mozilla Firefox Thunderbird thunderbird Browsers Debian Ubuntu Wolfi
  • Medium 5.3
    CVE-2025-0238

    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 12…

    Mozilla Firefox Thunderbird thunderbird Browsers Debian Ubuntu Wolfi
  • Medium 5.3
    CVE-2025-0244

    Address bar spoofing using an invalid protocol scheme on Firefox for Android

    When redirecting to an invalid protocol scheme, an attacker could spoof the address bar. *Note: This issue only affected Android operating systems. Other operating systems are unaffected.*. This vulnerability was fixed in Firefox 134.

    Mozilla Firefox firefox Browsers Wolfi
  • Medium 5.1
    CVE-2025-0243

    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.…

    Mozilla Firefox Thunderbird thunderbird Browsers Debian Ubuntu Wolfi
  • Medium 4.0
    CVE-2025-0239

    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.

    Mozilla Firefox Thunderbird thunderbird Browsers Debian Ubuntu Wolfi
  • Medium 4.0
    CVE-2025-0240

    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.

    Mozilla Firefox Thunderbird thunderbird Browsers Debian Ubuntu Wolfi
  • Low 3.3
    CVE-2025-0245

    Lock screen setting bypass in Firefox Focus for Android

    Under certain circumstances, a user opt-in setting that Focus should require authentication before use could have been be bypassed. This vulnerability was fixed in Firefox 134.

    Mozilla Firefox firefox Browsers Wolfi

Revision history

  1. #17

    Neue Updates von Ubuntu aufgenommen

  2. #16

    Neue Updates von Gentoo aufgenommen

  3. #15

    Neue Updates von XEROX aufgenommen

  4. #14

    Neue Updates von Gentoo aufgenommen

  5. #13

    Neue Updates von Amazon aufgenommen

  6. #12

    Neue Updates von Amazon aufgenommen

  7. #11

    Neue Updates von Amazon aufgenommen

  8. #10

    Neue Updates von Oracle Linux aufgenommen

  9. #9

    Neue Updates von Gentoo aufgenommen

  10. #8

    Neue Updates von IGEL aufgenommen

  11. #7

    Neue Updates von Rocky Enterprise Software Foundation aufgenommen

  12. #6

    Neue Updates von openSUSE aufgenommen

  13. #5

    Neue Updates von SUSE, openSUSE und Oracle Linux aufgenommen

  14. #4

    Neue Updates von Debian, Oracle Linux und Rocky Enterprise Software Foundation aufgenommen

  15. #3

    Neue Updates von Red Hat, SUSE und Fedora aufgenommen

  16. #2

    Neue Updates von Mozilla, Red Hat, Debian, Ubuntu und openSUSE aufgenommen

  17. #1

    Initiale Fassung

References