Known vulnerabilities in Webmention

Enable conversation across the web.

4Reported vulnerabilities

7.2Highest CVSS score

5.9.0Latest version

900+Active installs

What to do now

Update Webmention to 5.8.1 or later. 4 of these have a fixed version available. Updating resolves them.

Plugin last updated: July 30, 2026 / Tested up to WordPress: 7.0.4 / View on wordpress.org

Reported vulnerabilities

Ordered by how urgently they need attention — whether a vulnerability is actually being exploited, and how likely exploitation is, rather than CVSS severity alone.

CVE	Severity	Exploit probability next 30 days	Affected versions	Fixed in	Published
CVE-2026-10513	High 7.2	0.4%	0 to 5.8.0 (inclusive)	`5.8.1`	June 30, 2026
CVE-2026-0686	High 7.2	0.3%	0 to 5.6.2 (inclusive)	`5.7.0`	April 2, 2026
CVE-2026-0688	Medium 6.4	0.2%	0 to 5.6.2 (inclusive)	`5.7.0`	April 2, 2026
WF-3d12d692-231b-4e15-a119-80fd74566af4	Medium 6.1	—	4.0.8 and earlier	`4.0.9`	March 8, 2023

Sources: vulnerability records from NVD, exploitation from CISA KEV, exploit probability from EPSS. Affected versions come from CPE ranges or from the reporting CNA.