CVE-2023-1381

The WP Meta SEO WordPress plugin before 4.5.5 does not validate image file paths before attempting to manipulate the image files, leading to a PHAR deserialization vulnerability. Furthermore, the plugin contains a gadget chain which may be used in certain configurations to achieve remote code execution.

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://blog.wpscan.com/uncovering-a-phar-deserialization-vulnerability-in-wp-meta-seo-and-escalating-to-rce/
• https://wpscan.com/vulnerability/f140a928-d297-4bd1-8552-bfebcedba536
• https://blog.wpscan.com/uncovering-a-phar-deserialization-vulnerability-in-wp-meta-seo-and-escalating-to-rce/
• https://wpscan.com/vulnerability/f140a928-d297-4bd1-8552-bfebcedba536