CVE-2024-31211

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.

Weakness

The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.

Affected Software

Potential Mitigations

• Make fields transient to protect them from deserialization.
• An attempt to serialize and then deserialize a class containing transient fields will result in NULLs where the transient data should be. This is an excellent way to prevent time, environment-based, or sensitive variables from being carried over and used improperly.

Related Attack Patterns

• https://cwe.mitre.org/data/definitions/586.html

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