CVE-2025-8031

CRITICAL 9.8CVE-2025-8031 · Published 22/07/2025 · updated 05/10/2026

Package	Affected versions	Patched versions
firefox mozilla	`≥ 140.0, < 140.1.0< 128.13.0< 141.0`	`140.1.0128.13.0141.0`
thunderbird mozilla	`≥ 140.0, < 140.1.0< 128.13.0< 141.0`	`140.1.0128.13.0141.0`

Description

The `username:password` part was not correctly stripped from URLs in CSP reports potentially leaking HTTP Basic Authentication credentials. This vulnerability was fixed in Firefox 141, Firefox ESR 128.13, Firefox ESR 140.1, Thunderbird 141, Thunderbird 128.13, and Thunderbird 140.1.

References

bugzilla.mozilla.org/show_bug.cgi · Permissions Required
mozilla.org/security/advisories/mfsa2025-56 · Vendor Advisory
mozilla.org/security/advisories/mfsa2025-58 · Vendor Advisory
mozilla.org/security/advisories/mfsa2025-59 · Vendor Advisory
mozilla.org/security/advisories/mfsa2025-61 · Vendor Advisory
mozilla.org/security/advisories/mfsa2025-62 · Vendor Advisory
mozilla.org/security/advisories/mfsa2025-63 · Vendor Advisory
lists.debian.org/debian-lts-announce/2025/07/msg00016.html

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