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CVE-2026-3220— Multiple Plugins - Unauthenticated Stored XSS via Minify Library

Quick assessment

Affected
Unknown Autoptimize
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

WordPress和WordPress plugin都是WordPress基金会的产品。WordPress是一套使用PHP语言开发的博客平台。该平台具有在基于PHP和MySQL的服务器上架设个人博客网站的功能。WordPress plugin是一个应用插件。 WordPress多款产品存在跨站脚本漏洞，该漏洞源于HTML压缩过程中使用可预测的替换哈希和滥用正则表达式，可能导致未经身份验证的存储型跨站脚本攻击。以下产品及版本受到影响：WordPress plugin Autoptimize 3.1.15之前

AI Predicted 9.8 Difficulty: Easy EPSS 0.45% · P37

Affected Version Matrix 3

VendorProduct Version RangeStatus
Unknown Autoptimize < 3.1.15 affected
Unknown Clearfy Cache < 2.4.2 affected
Unknown Speed Optimizer < 7.7.9 affected
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I. Basic Information for CVE-2026-3220

Vulnerability Information
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Vulnerability Title
Multiple Plugins - Unauthenticated Stored XSS via Minify Library
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
WordPress多款产品 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WordPress和WordPress plugin都是WordPress基金会的产品。WordPress是一套使用PHP语言开发的博客平台。该平台具有在基于PHP和MySQL的服务器上架设个人博客网站的功能。WordPress plugin是一个应用插件。 WordPress多款产品存在跨站脚本漏洞，该漏洞源于HTML压缩过程中使用可预测的替换哈希和滥用正则表达式，可能导致未经身份验证的存储型跨站脚本攻击。以下产品及版本受到影响：WordPress plugin Autoptimize 3.1.15之前
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Unknown Autoptimize 0 ~ 3.1.15 -
Unknown Clearfy Cache 0 ~ 2.4.2 -
Unknown Speed Optimizer 0 ~ 7.7.9 -

II. Public POCs for CVE-2026-3220

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-3220

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Vendor Advisories for CVE-2026-3220 (1)

Same Patch Batch · Unknown · 2026-05-18 · 5 CVEs total

CVE-2026-6381 WP Maps < 4.9.3 - Subscriber+ Local File Inclusion
CVE-2026-6495 Ajax Load More < 7.8.4 - Reflected XSS
CVE-2026-6379 WP Photo Album Plus < 9.1.11.001 - Unauthenticated SQL Injection via 'wppa-supersearch' Pa
CVE-2026-1631 Feeds for YouTube < 2.6.4 - Subscriber+ License Data Deletion

IV. Related Vulnerabilities

Same product: Autoptimize
Same vendor: Unknown

V. Comments for CVE-2026-3220

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