PT-2026-29687 · Pfefferle · Webmention

Published 2026-04-02 · Updated 2026-04-02 · CVE-2026-0688

NVD

CVSS v3.1

6.4

Medium

AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

The Webmention plugin for WordPress is vulnerable to Server-Side Request Forgery in all versions up to, and including, 5.6.2 via the 'Tools::read' function. This makes it possible for authenticated attackers, with Subscriber-level access and above, to make web requests to arbitrary locations originating from the web application and can be used to query and modify information from internal services.

Fix

SSRF

Weakness Enumeration

CWE-918

Related Identifiers

CVE-2026-0688

Affected Products

Webmention

References · 5

• https://nvd.nist.gov/vuln/detail/CVE-2026-0688 · Security Note
• https://wordfence.com/threat-intel/vulnerabilities/id/02c9beba-dfa5-4a30-8355-62ff9a2630f7?source=cve · Note
• https://github.com/pfefferle/wordpress-webmention/blob/057223cee18a9e93b017d0f21db6ea77a7686489/includes/class-tools.php#L81 · Note
• https://plugins.trac.wordpress.org/changeset/3494831/webmention · Note
• https://plugins.trac.wordpress.org/browser/webmention/tags/5.6.2/includes/class-tools.php#L81 · Note