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CVE-2022-40956

Date: December 22, 2022

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.

Severity Score

Related Resources (9)

https://www.mozilla.org/security/advisories/mfsa2022-42/
https://www.mozilla.org/security/advisories/mfsa2022-41/
https://access.redhat.com/security/cve/CVE-2022-40956
https://security-tracker.debian.org/tracker/CVE-2022-40956
https://www.mozilla.org/security/advisories/mfsa2022-40/
https://bugzilla.mozilla.org/show_bug.cgi?id=1770094
https://nvd.nist.gov/vuln/detail/CVE-2022-40956
https://people.canonical.com/~ubuntu-security/cve/CVE-2022-40956
https://www.mend.io/vulnerability-database/CVE-2022-40956

Severity Score

Weakness Type (CWE)

Cross-Site Scripting (XSS)

CWE-79

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): REQUIRED
Scope (S): CHANGED
Confidentiality (C): LOW
Integrity (I): LOW
Availability (A): NONE

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