CVE-2020-13543: WebKitGTK

High severity, CVSS 8.8. EPSS: 3.5% chance of exploitation in the next 30 days.

A code execution vulnerability exists in the WebSocket functionality of Webkit WebKitGTK 2.30.0. A specially crafted web page can trigger a use-after-free vulnerability which can lead to remote code execution. An attacker can get a user to visit a webpage to trigger this vulnerability.

Affected products

• WebKitGTK WebKitGTK: version 2.30.0 only

Published 2020-12-03. Last modified 2026-06-17.