CVE-2026-0686

HIGH

Webmention <= 5.6.2 - Unauthenticated Blind Server-Side Request Forgery

Title source: cna
STIX 2.1

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.

References (5)

Core 5

Scores

CVSS v3 7.2
EPSS 0.0030
EPSS Percentile 21.7%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
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