CVE-2025-8031

critical

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

https://www.mozilla.org/security/advisories/mfsa2025-63/

https://www.mozilla.org/security/advisories/mfsa2025-62/

https://www.mozilla.org/security/advisories/mfsa2025-61/

https://www.mozilla.org/security/advisories/mfsa2025-59/

https://www.mozilla.org/security/advisories/mfsa2025-58/

https://www.mozilla.org/security/advisories/mfsa2025-56/

https://lists.debian.org/debian-lts-announce/2025/07/msg00016.html

https://bugzilla.mozilla.org/show_bug.cgi?id=1971719

Details

Source: Mitre, NVD

Published: 2025-07-22

Updated: 2026-04-13

Risk Information

CVSS v2

Base Score: 10

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

Severity: Critical

CVSS v3

Base Score: 9.8

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Severity: Critical

EPSS

EPSS: 0.00046