CVE-2026-0688

MEDIUM

Webmention <= 5.6.2 - Authenticated (Subscriber+) Server-Side Request Forgery

Title source: cna

Description

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.

References (4)

https://www.wordfence.com/threat-intel/vulnerabilities/id/02c9beba-dfa5-4a30-8355-62ff9a2630f7?source=cve

https://github.com/pfefferle/wordpress-webmention/blob/057223cee18a9e93b017d0f21db6ea77a7686489/includes/class-tools.php#L81

View Writeup ZIP pw:eip

https://plugins.trac.wordpress.org/browser/webmention/tags/5.6.2/includes/class-tools.php#L81

https://plugins.trac.wordpress.org/changeset/3494831/webmention

Scores

CVSS v3 6.4

EPSS 0.0003

EPSS Percentile 8.4%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-918

Status published

Products (1)

pfefferle/Webmention < 5.6.2

Published Apr 02, 2026

Tracked Since Apr 02, 2026