Webmention vulnerabilities
Plugin slug webmention · 5 known vulnerabilities · latest disclosed 2026-10-30 · WordPress.org page
Every listed vulnerability has a fix. Version 5.10.2 or later is not affected by any of them. If your site runs an older version, update it.
2 of 5 rated high or critical (CVSS 7 or more).
Known vulnerabilities in Webmention
| Severity | Affected versions | Fixed in | CVE | Published | Details |
|---|---|---|---|---|---|
| Medium 6.1 | <= 5.10.1 | 5.10.2 | CVE-2026-111109 | 2026-10-30 | Advisory |
| High 7.2 | <= 5.8.0 | 5.8.1 | CVE-2026-10513 | 2026-06-30 | Advisory |
| Medium 6.4 | <= 5.6.2 | 5.7.0 | CVE-2026-0688 | 2026-04-01 | Advisory |
| High 7.2 | <= 5.6.2 | 5.7.0 | CVE-2026-0686 | 2026-04-01 | Advisory |
| Medium 6.1 | <= 4.0.8 | 4.0.9 | none | 2023-03-08 | Advisory |
Check if a site is affected
Enter a site address to see which version of Webmention and other plugins it runs, and whether they match a known vulnerability.
Questions
Is the Webmention plugin safe to use?
All 5 known issues are fixed in current versions (5.10.2 or later). Keeping it updated is what matters.
How do I check which version of Webmention my site runs?
In WordPress go to Plugins > Installed Plugins. From the outside, the free PluginPeek scan below reads the version from the site's public files.
How do I fix a vulnerable plugin?
Make a full backup, then update it from Dashboard > Updates and check the site afterwards. If you would rather not, we can do it for a fixed $99, paid after you have checked the site.