CVE-2026-0686
Webmention <= 5.6.2 - Unauthenticated Blind Server-Side Request Forgery
CVSS Score
7.2
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-918 |
| Vendor | pfefferle |
| Product | webmention |
| Published | Apr 2, 2026 |
| Last Updated | Apr 8, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
pfefferle / Webmention
0 ≤ 5.6.2
References
wordfence.com: https://www.wordfence.com/threat-intel/vulnerabilities/id/08d15c46-d15f-4803-80be-90bf33335c18?source=cve github.com: https://github.com/pfefferle/wordpress-webmention/blob/057223cee18a9e93b017d0f21db6ea77a7686489/includes/handler/class-mf2.php#L878 plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/webmention/tags/5.6.2/includes/handler/class-mf2.php#L877 plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/webmention/tags/5.6.2/includes/class-receiver.php#L260 plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/changeset/3494831/webmention
Credits
Duong Quang Hao