Perfmatters vulnerabilities
Plugin slug perfmatters · 9 known vulnerabilities · latest disclosed 2026-07-01 · WordPress.org page
Every listed vulnerability has a fix. Version 2.6.5 or later is not affected by any of them. If your site runs an older version, update it.
4 of 9 rated high or critical (CVSS 7 or more).
Known vulnerabilities in Perfmatters
| Severity | Affected versions | Fixed in | CVE | Published | Details |
|---|---|---|---|---|---|
| High 7.5 | <= 2.6.4 | 2.6.5 | CVE-2026-13251 | 2026-07-01 | Advisory |
| High 7.2 | <= 2.6.4 | 2.6.5 | CVE-2026-57671 | 2026-06-30 | Advisory |
| Medium 6.1 | <= 2.6.3 | 2.6.4 | CVE-2026-56047 | 2026-06-25 | Advisory |
| High 8.1 | <= 2.5.9 | 2.6.0 | CVE-2026-4351 | 2026-04-09 | Advisory |
| High 8.1 | <= 2.5.9.1 | 2.6.0 | CVE-2026-4350 | 2026-04-02 | Advisory |
| Medium 6.1 | <= 2.1.6 | 2.1.7 | CVE-2023-47876 | 2023-11-21 | Advisory |
| Medium 4.3 | <= 2.1.6 | 2.1.7 | CVE-2023-47875 | 2023-11-21 | Advisory |
| Medium 6.4 | < 2.2.0 | 2.2.0 | CVE-2023-47877 | 2023-11-21 | Advisory |
| Medium 5.3 | <= 2.1.6 | 2.1.7 | CVE-2023-47874 | 2023-11-20 | Advisory |
Check if a site is affected
Enter a site address to see which version of Perfmatters and other plugins it runs, and whether they match a known vulnerability.
Questions
Is the Perfmatters plugin safe to use?
All 9 known issues are fixed in current versions (2.6.5 or later). Keeping it updated is what matters.
How do I check which version of Perfmatters 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.