CVE-2021-23983

MEDIUM

Firefox < 87.0 - Out-of-bounds Write via CSS Rule Transition

Title source: llm
STIX 2.1

Description

By causing a transition on a parent node by removing a CSS rule, an invalid property for a marker could have been applied, resulting in memory corruption and a potentially exploitable crash. This vulnerability affects Firefox < 87.

References (2)

Core 2
Core References
Issue Tracking, Permissions Required, Vendor Advisory x_refsource_misc
https://bugzilla.mozilla.org/show_bug.cgi?id=1692684

Scores

CVSS v3 6.5
EPSS 0.0037
EPSS Percentile 58.7%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Details

CWE
CWE-787
Status published
Products (1)
mozilla/firefox < 87.0
Published Mar 31, 2021
Tracked Since Feb 18, 2026