HIGH
Webmention <= 5.6.2 - Unauthenticated Blind Server-Side Request Forgery
Published Apr 2, 2026
7.2
HIGHCVSS 3.1
EPSS 0.30%
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.
Affected products
-
- Version 0StatusaffectedConstraints<=5.6.2
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Pfefferle | Webmention | unaffected |
|
No data.
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Weaknesses (1)
References (6)
- https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-18132 Advisory
- https://github.com/pfefferle/wordpress-webmention/blob/057223cee18a9e93b017d0f21db6ea77a7686489/includes/handler/class-mf2.php#L878
- https://plugins.trac.wordpress.org/browser/webmention/tags/5.6.2/includes/class-receiver.php#L260
- https://plugins.trac.wordpress.org/browser/webmention/tags/5.6.2/includes/handler/class-mf2.php#L877
- https://plugins.trac.wordpress.org/changeset/3494831/webmention
- https://www.wordfence.com/threat-intel/vulnerabilities/id/08d15c46-d15f-4803-80be-90bf33335c18?source=cve
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner Wordfence
Published Apr 2, 2026
Updated Apr 8, 2026
Reserved Jan 7, 2026
Link CVE-2026-0686
CISA Vulnrichment
Updated Apr 2, 2026
ENISA EUVD
EUVD-2026-18132 Assigner Wordfence
Published Apr 2, 2026
Updated Apr 8, 2026
Exploited since n/a
Link EUVD-2026-18132