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)

Published · last modified .

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.

EPSS exploit prediction

EPSS: 0.003 (23.1th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 23rd percentile — 23.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-3881: held from 0.003 to 0.003.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: +0.001

Affected products

  • Performance Monitor — versions 0

Weakness classification (CWE)

References

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.