CVE-2022-40956

MediumCVSS 6.1/10Last modified Jun 17, 2026

Description

When injecting an HTML base element, some requests would ignore the CSP's base-uri settings and accept the injected element's base instead. This vulnerability affects Firefox ESR < 102.3, Thunderbird < 102.3, and Firefox < 105.

Metrics

CVSS 3.1 6.1/10CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Weakness enumeration

CWE-79

Affected software

Vendor	Product	Versions
Mozilla	Firefox ESR	>= unspecified, < 102.3
Mozilla	Thunderbird	>= unspecified, < 102.3
Mozilla	Firefox	>= unspecified, < 105

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1770094Issue Tracking, Permissions Required, Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2022-40/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2022-41/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2022-42/Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1770094Issue Tracking, Permissions Required, Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2022-40/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2022-41/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2022-42/Vendor Advisory

Timeline

Published: Dec 22, 2022
Last modified: Jun 17, 2026
NVD status: Modified

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