What is CVE-2026-13251?

CVE-2026-13251 is a high-severity vulnerability in Perfmatters, classified under Path Traversal. CVSS score: 7.5/10. Published 2026-07-02.

How severe is CVE-2026-13251?

High severity. CVSS v3 base score is 7.5 out of 10.

Path Traversal in Perfmatters

CVE-2026-13251

The Perfmatters plugin for WordPress is vulnerable to Directory Traversal in all versions up to, and including, 2.6.4 via the 's' parameter. This makes it possible for unauthenticated attackers to read the contents of arbitrary files on the server, which can contain sensitive information. Exploitation requires the Local Google Fonts feature to be enabled (disabled by default), pretty permalinks to be active, and RSS feed links to remain enabled in the plugin settings.

Vulnerability class: Path Traversal (Directory Traversal)

EPSS: 0.006 (47.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

Affected products

Perfmatters — versions 0

Weakness classification (CWE)

CWE-22 — Path Traversal

References

Frequently asked questions

What is CVE-2026-13251?: CVE-2026-13251 is a high-severity vulnerability in Perfmatters, classified under Path Traversal. CVSS score: 7.5/10. Published 2026-07-02.
How severe is CVE-2026-13251?: High severity. CVSS v3 base score is 7.5 out of 10.