Description

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.

INFO

Published Date :

2025-05-27T12:29:25.084Z

Last Modified :

2026-04-13T14:29:08.538Z

Source :

mozilla
AFFECTED PRODUCTS

The following products are affected by CVE-2025-5266 vulnerability.

Vendors Products
Mozilla
  • Firefox
Redhat
  • Enterprise Linux
  • Rhel Aus
  • Rhel E4s
  • Rhel Els
  • Rhel Eus
  • Rhel Tus
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2025-5266.

URL Resource
https://bugzilla.mozilla.org/show_bug.cgi?id=1965628 cve-icon cve-icon
https://lists.debian.org/debian-lts-announce/2025/05/msg00043.html cve-icon
https://lists.debian.org/debian-lts-announce/2025/05/msg00046.html cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2025-5266 cve-icon
https://www.cve.org/CVERecord?id=CVE-2025-5266 cve-icon
https://www.mozilla.org/en-US/security/advisories/mfsa2025-44/#CVE-2025-5266 cve-icon
https://www.mozilla.org/en-US/security/advisories/mfsa2025-46/#CVE-2025-5266 cve-icon
https://www.mozilla.org/security/advisories/mfsa2025-42/ cve-icon cve-icon
https://www.mozilla.org/security/advisories/mfsa2025-44/ cve-icon cve-icon
https://www.mozilla.org/security/advisories/mfsa2025-45/ cve-icon cve-icon
https://www.mozilla.org/security/advisories/mfsa2025-46/ cve-icon cve-icon
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CVSS Vulnerability Scoring System

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