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Case File

CVE-2023-4255

MEDIUM · CVSS 5.5 EPSS 0.32% Public Exploit

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2023-12-21 · Last synced 2026-08-04

CyberRota Analysis

This is a medium severity vulnerability with a CVSS score of 5.5. Public exploit code or proof-of-concept references have been detected in its references. It may lead to a denial-of-service condition.

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-2023-4255
Severity
MEDIUM
CVSS
5.5
EPSS
0.32%

Original NVD Description

An out-of-bounds write issue has been discovered in the backspace handling of the checkType() function in etc.c within the W3M application. This vulnerability is triggered by supplying a specially crafted HTML file to the w3m binary. Exploitation of this flaw could lead to application crashes, resulting in a denial of service condition.

Related CVEs

Other vulnerabilities affecting the same vendor(s)