CVE-2026-3220highCWE-79

CVE-2026-3220: high-severity vulnerability in Autoptimize

Multiple Plugins - Unauthenticated Stored XSS via Minify Library

Published

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41Vexday Risk Score

No sign of exploitation. It has a public proof of concept.

ssvc Attendcvss 8.8epss 0.3%
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Affected products
Unknown · AutoptimizeUnknown · Clearfy CacheUnknown · Speed Optimizer
⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
Related CVEs — Autoptimize

In the same product, most dangerous first.

CVE-2021-24376—Autoptimize < 2.7.8 - Arbitrary File Upload via "Import Settings"EPSS 3.7%CVE-2022-4057MEDIUMAutoptimize < 3.1.0 - Sensitive Data DisclosureEPSS 1.5%CVE-2021-24377—Autoptimize < 2.7.8 - Race Condition leading to RCEEPSS 1.2%CVE-2022-2635—Autoptimize < 3.1.1 - Admin+ Stored Cross Site ScriptingEPSS 0.6%CVE-2021-24332—Autoptimize < 2.8.4 - Authenticated Stored Cross-Site Scripting (XSS)EPSS 0.6%CVE-2021-24378—Autoptimize < 2.7.8 - Authenticated Stored XSS via File UploadEPSS 0.6%