TI-2026-02783 Aliases CVE-2026-3220 GHSA-3jpv-pgxw-p274

Multiple Plugins - Unauthenticated Stored XSS via Minify Library

HIGH 73CWE-79Published 2026-05-18 · Updated 2026-05-18

Key facts

Attack vector: Network
Privileges required: None
User interaction: Required
Attack complexity: Low
Impact type: Cross-site scripting
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-79.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.0032 25th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by the CNA

Fix Fixed Autoptimize (Unknown): 3.1.15Clearfy Cache (Unknown): 2.4.2+1 more product

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Unknown	Autoptimize	before 3.1.15	3.1.15	Patch available	CNA
Unknown	Clearfy Cache	before 2.4.2	2.4.2	Patch available	CNA
Unknown	Speed Optimizer	before 7.7.9	7.7.9	Patch available	CNA

Autoptimize VendorUnknown Affected before 3.1.15 Fixed in 3.1.15 Patch available CNA
Clearfy Cache VendorUnknown Affected before 2.4.2 Fixed in 2.4.2 Patch available CNA
Speed Optimizer VendorUnknown Affected before 7.7.9 Fixed in 7.7.9 Patch available CNA

Remediation

Fix · CNA Autoptimize (Unknown) Fixed in 3.1.15
Fix · CNA Clearfy Cache (Unknown) Fixed in 2.4.2
Fix · CNA Speed Optimizer (Unknown) Fixed in 7.7.9

Timeline

2026-10-02 Threatist record created from CVE-2026-3220
2026-10-03 Alias added: GHSA-3jpv-pgxw-p274

References

Exploit 1

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

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences