Server-Side Request Forgery Vulnerability in Webmention Plugin for WordPress
CVE-2026-0686

7.2HIGH

Key Information:

Vendor

WordPress
Status
Webmention
Vendor
CVE Published:
2 April 2026

What is CVE-2026-0686?

The Webmention plugin for WordPress is susceptible to a Server-Side Request Forgery vulnerability affecting all versions up to 5.6.2. This issue resides in the 'MF2::parse_authorpage' function and can be exploited through the 'Receiver::post' function. Unauthenticated attackers can leverage this vulnerability to send web requests to arbitrary locations from the web application, enabling them to potentially query and manipulate information from internal services.

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Affected Version(s)

Webmention 0 <= 5.6.2

References

https://www.wordfence.com/threat-intel/vulnerabilities/id...
https://github.com/pfefferle/wordpress-webmention/blob/05...
https://plugins.trac.wordpress.org/browser/webmention/tag...

CVSS V3.1

Score:
7.2
Severity:
HIGH
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Duong Quang Hao
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