Medium 6.4Published Apr 2, 2026

CVE-2026-0688Webmention <= 5.6.2 - Authenticated (Subscriber+) Server-Side Request Forgery

Updated under an hour ago (Oct 26, 2026, 3:23 PM ET)

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It affects pfefferle Webmention. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for pfefferle Webmention

Exploited in the last 30 days

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.

CVSS: 6.4 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Weakness (CWE): CWE-918
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Wordfence
NVD analysis: Deferred
Record last updated: Apr 8, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

pfefferle Webmention pfefferle:webmention (from the name)	through 5.6.2	CNA record

References

References

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
https://plugins.trac.wordpress.org/browser/webmention/tags/5.6.2/includes/class-tools.php#L81
https://plugins.trac.wordpress.org/changeset/3494831/webmention

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.