CVE-2024-31211: Remote Code Execution in `WP_HTML_Token`

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-04-04 · updated 2026-06-17
Weakness: CWE-502

Description

WordPress is an open publishing platform for the Web. Unserialization of instances of the `WP_HTML_Token` class allows for code execution via its `__destruct()` magic method. This issue was fixed in WordPress 6.4.2 on December 6th, 2023. Versions prior to 6.4.0 are not affected.

Affected products

WordPress: from 6.4.0 before 6.4.2 — fixed in 6.4.2

How to fix

Upgrade to a fixed version: WordPress 6.4.2. Check the vendor advisory for mitigations.

References

https://github.com/WordPress/wordpress-develop/security/advisories/GHSA-m257-q4m5-j653
https://github.com/WordPress/wordpress-develop/security/advisories/GHSA-m257-q4m5-j653

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