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Case File

CVE-2018-18500

CRITICAL · CVSS 9.8 EPSS 12.66% Public Exploit

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2019-02-05 · 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-2018-18500
Severity
CRITICAL
CVSS
9.8
EPSS
12.66%
Firefox

Original NVD Description

A use-after-free vulnerability can occur while parsing an HTML5 stream in concert with custom HTML elements. This results in the stream parser object being freed while still in use, leading to a potentially exploitable crash. This vulnerability affects Thunderbird < 60.5, Firefox ESR < 60.5, and Firefox < 65.