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CVE-2022-40956

Mozilla: Content-Security-Policy base-uri bypass

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Severity

Low

Red Hat Product Security

6.1

CVSS 3.0

Review impact separately from score.

Published · September 20, 2022

Updated · November 21, 2025

Description

A flaw was found in Mozilla. The Mozilla Foundation Security Advisory describes the issue that when injecting an HTML base element; some requests would ignore the CSP's base-uri settings and accept the injected element's base instead.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.0 · 6.1
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CWE-1021 · Improper Restriction of Rendered UI Layers or Frames