AUGUST 4, 2026
Live Feed
Back to database
Case File

CVE-2021-23960

HIGH · CVSS 8.8 EPSS 1.20% Public Exploit

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2021-02-26 · Last synced 2026-08-04

CyberRota Analysis

AI analysis pending.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

Detected Signals
exploit

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2021-23960
Severity
HIGH
CVSS
8.8
EPSS
1.20%
Firefox Java

Original NVD Description

Performing garbage collection on re-declared JavaScript variables resulted in a user-after-poison, and a potentially exploitable crash. This vulnerability affects Firefox < 85, Thunderbird < 78.7, and Firefox ESR < 78.7.