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CVE-2026-6397— Sticky <= 2.5.6 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'readmoretext' Shortcode Attribute

Quick assessment

Affected
cvmh Sticky
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 plugin Sticky 2.5.6及之前版本存在跨站脚本漏洞，该漏洞源于cvmh_sticky_front_render函数中readmoretext属性输入清理和输出转义不足，可能导致具有贡献者及以上权限的认证攻击者注入任意

CVSS 6.4 · Medium EPSS 0.24% · P16

Affected Version Matrix 1

VendorProduct Version RangeStatus
cvmh Sticky ≤ 2.5.6 affected
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I. Basic Information for CVE-2026-6397

Vulnerability Information
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Vulnerability Title
Sticky <= 2.5.6 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'readmoretext' Shortcode Attribute
Source: CVE Program / CVE List V5
Vulnerability Description
The Sticky plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the `cvmh-sticky` shortcode `readmoretext` attribute in versions up to and including 2.5.6. This is due to insufficient input sanitization and output escaping in the `cvmh_sticky_front_render()` function — the `readmoretext` attribute value is passed through `apply_filters()` and directly concatenated into the HTML output without any escaping function such as `esc_html()`. 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 a page containing the injected shortcode.
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 plugin Sticky 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 plugin Sticky 2.5.6及之前版本存在跨站脚本漏洞，该漏洞源于cvmh_sticky_front_render函数中readmoretext属性输入清理和输出转义不足，可能导致具有贡献者及以上权限的认证攻击者注入任意
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
cvmh Sticky 0 ~ 2.5.6 -

II. Public POCs for CVE-2026-6397

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III. Intelligence Information for CVE-2026-6397

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Patches & Fixes for CVE-2026-6397 (3)

Vendor Advisories for CVE-2026-6397 (1)

IV. Related Vulnerabilities

Same product: Sticky
Same weakness: CWE-79

V. Comments for CVE-2026-6397

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