CVE-2026-3220— Multiple Plugins - Unauthenticated Stored XSS via Minify Library
Possible ATT&CK Techniques 3AI
T1071 · Application Layer Protocol T1059 · Command and Scripting Interpreter T1189 · Drive-by CompromiseAffected Version Matrix 3
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| 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: NVD (National Vulnerability Database)
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: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
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 |
|---|
AI-Generated POCPremium
No public POC found.
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Advisory · 1
- Multiple Plugins – Unauthenticated Stored XSS via Minify Library | CVE 2026-3220 | Plugin Vulnerabilitiesexploitvdb-entrytechnical-description
- https://nvd.nist.gov/vuln/detail/CVE-2026-3220
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
- CVE-2026-2430
Autoptimize <= 3.1.14 - Authenticated (Contributor+) Stored - CVE-2026-2352
Autoptimize <= 3.1.14 - Authenticated (Contributor+) Stored - CVE-2025-13401
Autoptimize <= 3.1.13 - Authenticated (Contributor+) Stored - CVE-2023-2113
Autoptimize < 3.1.7 - Admin+ Stored Cross-Site Scripting via - CVE-2022-4057
Autoptimize < 3.1.0 - Sensitive Data Disclosure
Same vendor: Unknown
- CVE-2026-7385
Decent Comments < 3.0.2 - Unauthenticated Email Address Disc - CVE-2026-5776
Email Encoder < 2.4.7 - Unauthenticated Stored XSS - CVE-2025-15609
Fortis For WooCommerce < 1.3.1 - Sensitive API Key Disclosur - CVE-2026-6381
WP Maps < 4.9.3 - Subscriber+ Local File Inclusion - CVE-2026-6495
Ajax Load More < 7.8.4 - Reflected XSS
V. Comments for CVE-2026-3220
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