What is CVE-2026-4350?

CVE-2026-4350 is a high-severity vulnerability in Perfmatters, classified under Path Traversal. CVSS score: 8.1/10. Published 2026-04-03.

How severe is CVE-2026-4350?

High severity. CVSS v3 base score is 8.1 out of 10.

Is CVE-2026-4350 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Path Traversal in Perfmatters

CVE-2026-4350

The Perfmatters plugin for WordPress is vulnerable to arbitrary file deletion via path traversal in all versions up to, and including, 2.5.9.1. This is due to the `PMCS::action_handler()` method processing the `$_GET['delete']` parameter w…

Vulnerability class: Path Traversal (Directory Traversal)

EPSS: 0.001 (16.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H.

Affected products

Perfmatters — versions 0

Weakness classification (CWE)

CWE-22 — Path Traversal

Public proof-of-concept exploits

whyiamsobusy/CVE-2026-4350

References

Frequently asked questions

What is CVE-2026-4350?: CVE-2026-4350 is a high-severity vulnerability in Perfmatters, classified under Path Traversal. CVSS score: 8.1/10. Published 2026-04-03.
How severe is CVE-2026-4350?: High severity. CVSS v3 base score is 8.1 out of 10.
Is CVE-2026-4350 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.