CVE-2026-15393— Cozy Blocks <= 2.2.11 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'postMeta.font.size' Block Attribute
Possible ATT&CK Techniques 3AI
T1505.003 · Web Shell T1059.007 · JavaScript T1189 · Drive-by CompromiseAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| cozythemes | Cozy Blocks – Page Builder for Gutenberg Editor & FSE with 600+ Patterns, 58 Blocks & Templates | ≤ 2.2.11 | affected |
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I. Basic Information for CVE-2026-15393
Vulnerability Information
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Vulnerability Title
Cozy Blocks <= 2.2.11 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'postMeta.font.size' Block Attribute
Source: CVE Program / CVE List V5
Vulnerability Description
The Cozy Blocks – Page Builder for Gutenberg Editor & FSE with 600+ Patterns, 58 Blocks & Templates plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'postMeta.font.size' Block Attribute in all versions up to, and including, 2.2.11 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
WordPress Cozy Blocks 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WordPress Cozy Blocks是WordPress基金会的一个CMS可视化构建区块组件。 WordPress Cozy Blocks 2.2.11及之前版本存在跨站脚本漏洞，该漏洞源于通过'postMeta.font.size' Block Attribute的输入清理和输出转义不足，可能导致经过身份验证的攻击者注入任意Web脚本并在用户访问时执行。
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 |
|---|---|---|---|---|
| cozythemes | Cozy Blocks – Page Builder for Gutenberg Editor & FSE with 600+ Patterns, 58 Blocks & Templates | 0 ~ 2.2.11 | - |
II. Public POCs for CVE-2026-15393
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POCPremium
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Patches & Fixes for CVE-2026-15393 (1)
News Coverage for CVE-2026-15393 (1)
IV. Related Vulnerabilities
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WordPress SaasLauncher Theme <= 1.3.0 - Broken Access Contro
Same weakness: CWE-79
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