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OpenAdvisories
High WID-SEC-2025-1160 11 CVEs

Mozilla Firefox und Thunderbird: Mehrere Schwachstellen

Published May 27, 2025 · Updated Jun 10, 2026 · Revision 20 · de-DE

Vendor: amazon Vendor: Debian Vendor: Fedora Vendor: Mozilla Vendor: Oracle Vendor: Red Hat Vendor: SUSE Vendor: Ubuntu Product: Enterprise Linux Product: Firefox Product: Firefox ESR Product: Linux Product: Linux Product: Linux Product: Linux Product: Linux Product: Linux 2 Product: openSUSE Product: Thunderbird Platform: Linux Platform: Windows

Summary

Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in Mozilla Firefox, Mozilla Firefox ESR und Mozilla Thunderbird ausnutzen, um beliebigen Programmcode auszuführen, einen Denial-of-Service auszulösen, Sicherheitsvorkehrungen zu umgehen oder Informationen offenzulegen.

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

  • High 8.1
    CVE-2025-5268

    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 cod…

    Mozilla Firefox Thunderbird thunderbird Browsers Debian Ubuntu Wolfi
  • High 8.1
    CVE-2025-5269

    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…

    Mozilla Firefox Thunderbird thunderbird Browsers Debian Ubuntu Wolfi
  • High 7.5
    CVE-2025-5262

    A double-free could have occurred in `vpx_codec_enc_init_multi` after a failed allocation when initializing the encoder…

    Mozilla Thunderbird mozjs52 mozjs68 Ubuntu
  • High 7.5
    CVE-2025-5270

    SNI was sometimes unencrypted

    In certain cases, SNI could have been sent unencrypted even when encrypted DNS was enabled. This vulnerability was fixed in Firefox 139 and Thunderbird 139.

    Mozilla Firefox Thunderbird thunderbird Browsers Ubuntu Wolfi
  • High 7.3
    CVE-2025-5272

    Memory safety bugs fixed in Firefox 139 and Thunderbird 139

    Memory safety bugs present in Firefox 138 and Thunderbird 138. 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
  • Medium 6.5
    CVE-2025-5271

    Devtools' preview ignored CSP headers

    Previewing a response in Devtools ignored CSP headers, which could have allowed content injection attacks. This vulnerability was fixed in Firefox 139 and Thunderbird 139.

    Mozilla Firefox Thunderbird thunderbird Browsers Ubuntu Wolfi
  • Medium 5.4
    CVE-2025-5267

    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.

    Mozilla Firefox Thunderbird thunderbird Browsers Debian Ubuntu Wolfi
  • Medium 4.8
    CVE-2025-5264

    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…

    Mozilla Firefox Thunderbird thunderbird Browsers Debian Ubuntu Wolfi
  • Medium 4.8
    CVE-2025-5265

    Potential local code execution in “Copy as cURL” command

    Due to insufficient escaping of the ampersand 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 bug only affects Firefox for Windows. Other …

    Mozilla Firefox Thunderbird thunderbird Browsers Ubuntu Wolfi
  • Medium 4.3
    CVE-2025-5263

    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.

    Mozilla Firefox Thunderbird thunderbird Browsers Debian Ubuntu Wolfi
  • Medium 4.3
    CVE-2025-5266

    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.

    Mozilla Firefox Thunderbird thunderbird Browsers Debian Ubuntu Wolfi

Revision history

  1. #20

    Neue Updates von Oracle Linux aufgenommen

  2. #19

    Neue Updates von Oracle Linux aufgenommen

  3. #18

    Neue Updates von SUSE aufgenommen

  4. #17

    Neue Updates von openSUSE aufgenommen

  5. #16

    Neue Updates von Ubuntu aufgenommen

  6. #15

    Neue Updates von openSUSE aufgenommen

  7. #14

    Neue Updates von Amazon aufgenommen

  8. #13

    Neue Updates von Oracle Linux aufgenommen

  9. #12

    Neue Updates von Oracle Linux aufgenommen

  10. #11

    Neue Updates von Red Hat aufgenommen

  11. #10

    Neue Updates von SUSE aufgenommen

  12. #9

    Neue Updates von Amazon aufgenommen

  13. #8

    Neue Updates von Oracle Linux und Amazon aufgenommen

  14. #7

    Neue Updates von Oracle Linux und Red Hat aufgenommen

  15. #6

    Neue Updates von Red Hat aufgenommen

  16. #5

    Neue Updates von openSUSE und SUSE aufgenommen

  17. #4

    Neue Updates von Fedora aufgenommen

  18. #3

    Neue Updates von openSUSE, SUSE, Red Hat und Debian aufgenommen

  19. #2

    Neue Updates von Oracle Linux, Red Hat, Debian und Fedora aufgenommen

  20. #1

    Initiale Fassung

References