CVE-2021-29953

MEDIUM

Firefox < 88.0.1 and Firefox for Android < 88.1.3 - Universal Cross-Site Scripting

Title source: llm
STIX 2.1

Description

A malicious webpage could have forced a Firefox for Android user into executing attacker-controlled JavaScript in the context of another domain, resulting in a Universal Cross-Site Scripting vulnerability. *Note: This issue only affected Firefox for Android. Other operating systems are unaffected. Further details are being temporarily withheld to allow users an opportunity to update.*. This vulnerability affects Firefox < 88.0.1 and Firefox for Android < 88.1.3.

References (2)

Core 2
Core References
Release Notes, Vendor Advisory x_refsource_misc
https://www.mozilla.org/security/advisories/mfsa2021-20/
Permissions Required, Vendor Advisory x_refsource_misc
https://bugzilla.mozilla.org/show_bug.cgi?id=1701684

Scores

CVSS v3 6.1
EPSS 0.0039
EPSS Percentile 60.3%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Details

CWE
CWE-79
Status published
Products (2)
mozilla/firefox < 88.0.1
mozilla/firefox < 88.1.3
Published Jun 24, 2021
Tracked Since Feb 18, 2026