CVE-2022-22759

CRITICAL

Firefox < 97, Thunderbird < 91.6, Firefox ESR < 91.6 - XSS

Title source: llm

Description

If a document created a sandboxed iframe without <code>allow-scripts</code>, and subsequently appended an element to the iframe's document that e.g. had a JavaScript event handler - the event handler would have run despite the iframe's sandbox. 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=1739957

[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 9.6

EPSS 0.0026

EPSS Percentile 49.6%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/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