CVE-2020-13543

Name: CVE-2020-13543
Creator: NVD / NIST
Published: 2020-12-03T17:15:12.083+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 3.27%

Last modified Jun 17, 2026

CVE-2020-13543 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. 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. EPSS estimates a 3.27% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

8.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS Probability

3.27%

86.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-416

Affected Software

Vendor	Product	Versions
Webkitgtk	Webkitgtk	2.30.0

References

https://security.gentoo.org/glsa/202012-10Third Party Advisory
https://talosintelligence.com/vulnerability_reports/TALOS-2020-1155Exploit, Technical Description, Third Party Advisory
https://www.oracle.com/security-alerts/cpuapr2022.htmlNot Applicable, Third Party Advisory
https://security.gentoo.org/glsa/202012-10Third Party Advisory
https://talosintelligence.com/vulnerability_reports/TALOS-2020-1155Exploit, Technical Description, Third Party Advisory
https://www.oracle.com/security-alerts/cpuapr2022.htmlNot Applicable, Third Party Advisory

Timeline

Published: Dec 3, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-13543?

How severe is CVE-2020-13543?

CVE-2020-13543 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 3.27% probability of exploitation in the next 30 days.

How do I fix CVE-2020-13543?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-13543?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST