CVE-2026-3220

HIGH8.8

Multiple Plugins - Unauthenticated Stored XSS via Minify Library

Published May 18, 2026

Modified 1 months ago

Details

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 replacement hash used during the HTML minification process and abusing a regular expression. This allows an attacker to inject arbitrary HTML attributes in the final HTML output by anticipating the placeholder format.

References

DETECTION

https://wpscan.com/vulnerability/3ceabf11-23cd-4c38-ba14-014348b0ff2d/

ADVISORY

https://www.cve.org/CVERecord?id=CVE-2026-3220

CVSS Analysis

CVSS v3.1

8.8

Exploitability

Attack Vector

NetworkAV:N

Attack Complexity

LowAC:L

Privileges Required

NonePR:N

User Interaction

RequiredUI:R

Scope

UnchangedS:U

Impact

Confidentiality

HighC:H

Integrity

HighI:H

Availability

HighA:H

8.8/CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Ecosystems

Timeline

PublishedMay 18, 2026

ModifiedMay 18, 2026