Vulnerability Description
The Webmention plugin for WordPress is vulnerable to Server-Side Request Forgery in all versions up to, and including, 5.6.2 in the 'MF2::parse_authorpage' function via the 'Receiver::post' function. This makes it possible for unauthenticated attackers to make web requests to arbitrary locations originating from the web application and can be used to query and modify information from internal services.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/pfefferle/wordpress-webmention/blob/057223cee18a9e93b017d0f21
- https://plugins.trac.wordpress.org/browser/webmention/tags/5.6.2/includes/class-
- https://plugins.trac.wordpress.org/browser/webmention/tags/5.6.2/includes/handle
- https://plugins.trac.wordpress.org/changeset/3494831/webmention
- https://www.wordfence.com/threat-intel/vulnerabilities/id/08d15c46-d15f-4803-80b
FAQ
What is CVE-2026-0686?
CVE-2026-0686 is a vulnerability with a CVSS score of 7.2 (HIGH). The Webmention plugin for WordPress is vulnerable to Server-Side Request Forgery in all versions up to, and including, 5.6.2 in the 'MF2::parse_authorpage' function via the 'Receiver::post' function. ...
How severe is CVE-2026-0686?
CVE-2026-0686 has been rated HIGH with a CVSS base score of 7.2/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-0686?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.