CVE-2026-3220 Details
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.
A vulnerability allowing unauthenticated stored cross-site scripting (XSS) has been identified in the Autoptimize WordPress plugin (prior to 3.1.15), Clearfy Cache WordPress plugin (prior to 2.4.2), and Speed Optimizer WordPress plugin (prior to 7.7.9). This vulnerability arises from a predictable replacement hash used during the HTML minification process, which is exploited by manipulating a regular expression. As a result, an attacker can inject arbitrary HTML attributes into the final output by anticipating the placeholder format.
Users of the affected plugins should update to Autoptimize version 3.1.15, Clearfy Cache version 2.4.2, or Speed Optimizer version 7.7.9.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed May 18, 2026CISA-ADP
Assessed May 18, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://wpscan.com/vulnerability/3ceabf11-23cd-4c38-ba14-014348b0ff2d/ | [email protected] | AdvisoryExploitRemedy |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-79 | Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') | CISA-ADP |
Affected Products
| Product | Versions |
|---|---|
| Autoptimize | < 3.1.15 (semver) |
CPE
Remediation
| |
| Clearfy Cache | < 2.4.2 (semver) |
CPE
Remediation
| |
| Speed Optimizer | < 7.7.9 (semver) |
CPE
Remediation
| |
Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| May 18, 2026 | CVE Modified | CISA-ADP |
| May 18, 2026 | New CVE Received | [email protected] |