WordPress plugin
Webmention security & vulnerabilities
No known unpatched vulnerabilities in the latest version
All 5 known vulnerabilities are fixed in the latest release. If you run an older version, update to null or newer.
- Critical0
- High2
- Medium3
- Low0
All Webmention vulnerabilities
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Webmention: common questions
Does Webmention have known vulnerabilities?
Yes. VulnCrest Radar lists 5 known vulnerabilities in Webmention: 2 high, 3 medium. None are known to affect version null.
How do I check which version of Webmention I run?
In wp-admin open Plugins → Installed Plugins; the version is shown under the name. Without admin access, our passive Check my site tool can often read it from public files.
What is the most recent Webmention vulnerability?
CVE-2026-111109, published Oct 30, 2026: Webmention <= 5.10.1 - Unauthenticated Stored Cross-Site Scripting via Open Graph og:title Meta Tag. Severity: Medium (CVSS 6.1).
Is any Webmention vulnerability listed in CISA KEV?
No. None of the known Webmention vulnerabilities is currently listed in the CISA KEV catalog.