CVE-2026-0686

HIGH EPSS 21.8%
Published Apr 2, 20263mo ago · Modified Jun 17, 20262w ago
7.2 CVSS 3.1
High
Find Similar
Published Apr 2, 2026 3mo ago
Last Modified Jun 17, 2026 2w ago

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 Details

Base Score
7.2
Exploitability
3.9
Impact
2.7
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Changed
Confidentiality Low
Integrity Low
Availability None

Threat Intelligence

EPSS Exploit Probability
21.8% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-918 Server-Side Request Forgery (SSRF) Validation

References 5

  • 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/class-receiver.php#L260
  • 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/changeset/3494831/webmention
  • wordfence.com https://www.wordfence.com/threat-intel/vulnerabilities/id/08d15c46-d15f-4803-80be-90bf33335c18?source=cve

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.