CVE-2021-23983

MediumCVSS 6.5/10Last modified Jun 17, 2026

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.

Metrics

CVSS 3.1 6.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-787

Affected software

Vendor	Product	Versions
Mozilla	Firefox	>= unspecified, < 87

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1692684Issue Tracking, Permissions Required, Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2021-10/Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1692684Issue Tracking, Permissions Required, Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2021-10/Vendor Advisory

Timeline

Published: Mar 31, 2021
Last modified: Jun 17, 2026
NVD status: Modified

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