High severity8.8NVD Advisory· Published May 18, 2026· Updated May 18, 2026
CVE-2026-3220
CVE-2026-3220
Description
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.
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Affected products
1Patches
Vulnerability mechanics
References
1News mentions
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