CVE-2022-22761

HIGH

Firefox < 97, Thunderbird < 91.6, Firefox ESR < 91.6 - Info Disclosure

Title source: llm

Description

Web-accessible extension pages (pages with a moz-extension:// scheme) were not correctly enforcing the frame-ancestors directive when it was used in the Web Extension's Content Security Policy. This vulnerability affects Firefox < 97, Thunderbird < 91.6, and Firefox ESR < 91.6.

References (4)

[Issue Tracking, Vendor Advisory] https://bugzilla.mozilla.org/show_bug.cgi?id=1745566

[Vendor Advisory] https://www.mozilla.org/security/advisories/mfsa2022-04/

[Vendor Advisory] https://www.mozilla.org/security/advisories/mfsa2022-05/

[Vendor Advisory] https://www.mozilla.org/security/advisories/mfsa2022-06/

Scores

CVSS v3 8.8

EPSS 0.0028

EPSS Percentile 51.1%

Attack Vector NETWORK

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

Classification

CWE

CWE-693

Status published

Affected Products (3)

mozilla/firefox < 97.0

mozilla/firefox_esr < 91.6

mozilla/thunderbird < 91.6

Timeline

Published Dec 22, 2022

Tracked Since Feb 18, 2026