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 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 v3.1

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

EPSS

0.32% chance of exploitation in the next 30 days, 24th percentile

Published

2026-05-18

Proof-of-concept exploits (1)

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

References

• CVE Record
• NVD entry

Related

• CVE-2026-32194
• CVE-2026-32201
• CVE-2026-32136
• CVE-2026-32202
• CVE-2026-32127
• CVE-2026-3222