What is CVE-2026-3220?

CVE-2026-3220 is a high-severity vulnerability in Autoptimize, classified under Cross-site Scripting. CVSS score: 8.8/10. Published 2026-05-18.

How severe is CVE-2026-3220?

High severity. CVSS v3 base score is 8.8 out of 10.

XSS in Autoptimize

CVE-2026-3220

The Autoptimize WordPress plugin before 3.1.15, Clearfy Cache WordPress plugin before 2.4.2, Speed Optimizer WordPress plugin before 7.7.9 are vulnerable to unauthenticated Stored Cross-Site Scripting (XSS) due to a predictable replaceme…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.000 (3.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

Affected products

Unknown Autoptimize — versions 0
Unknown Clearfy Cache — versions 0
Unknown Speed Optimizer — versions 0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

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

Frequently asked questions

What is CVE-2026-3220?: CVE-2026-3220 is a high-severity vulnerability in Autoptimize, classified under Cross-site Scripting. CVSS score: 8.8/10. Published 2026-05-18.
How severe is CVE-2026-3220?: High severity. CVSS v3 base score is 8.8 out of 10.