CVE-2021-23983

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CVSS 3.1

6.5 medium

EPSS

<1%p52

Published

Mar 31, 2021 (Mar 31, 2021)

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.

Vendors: mozilla
Products: firefox
Weakness: CWE-787
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

NVD CVE.org GitHub PoCs EPSS (0.7%)

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