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Case File

CVE-2023-6205

MEDIUM · CVSS 6.5 EPSS 0.86% Public Exploit

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2023-11-21 · Last synced 2026-08-04

CyberRota Analysis

This is a medium severity vulnerability with a CVSS score of 6.5. It affects Firefox. Public exploit code or proof-of-concept references have been detected in its references.

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-2023-6205
Severity
MEDIUM
CVSS
6.5
EPSS
0.86%
Firefox

Original NVD Description

It was possible to cause the use of a MessagePort after it had already been freed, which could potentially have led to an exploitable crash. This vulnerability affects Firefox < 120, Firefox ESR < 115.5.0, and Thunderbird < 115.5.

Related CVEs

Other vulnerabilities affecting the same vendor(s)