What is CVE-2026-3881?

CVE-2026-3881 is a medium-severity vulnerability in Performance Monitor, classified under Server-Side Request Forgery (SSRF). CVSS score: 5.8/10. Published 2026-03-31.

How severe is CVE-2026-3881?

Medium severity. CVSS v3 base score is 5.8 out of 10.

SSRF in Performance Monitor

CVE-2026-3881

The Performance Monitor WordPress plugin through 1.0.6 does not validate a parameter before making a request to it, which could allow unauthenticated users to perform SSRF attacks

Vulnerability class: SSRF (Server-Side Request Forgery)

EPSS: 0.003 (17.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N.

Affected products

Unknown Performance Monitor — versions 0

Weakness classification (CWE)

CWE-918 — Server-Side Request Forgery (SSRF)

References

contact@wpscan.com (technical-description, exploit, vdb-entry)

Frequently asked questions

What is CVE-2026-3881?: CVE-2026-3881 is a medium-severity vulnerability in Performance Monitor, classified under Server-Side Request Forgery (SSRF). CVSS score: 5.8/10. Published 2026-03-31.
How severe is CVE-2026-3881?: Medium severity. CVSS v3 base score is 5.8 out of 10.