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CVE-2026-12157— BetterDocs <= 4.5.3 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'blockId' Block Attribute

Quick assessment

Affected
wpdevteam BetterDocs – AI Documentation, Knowledge Base, Docs, Wikis, FAQ with Chatbot
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.

WPDeveloper BetterDocs是WPDeveloper公司的一个AI文档、知识库和FAQ管理的WordPress插件。 WPDeveloper BetterDocs 4.5.3及之前版本存在跨站脚本漏洞，该漏洞源于CategorySlateLayout::render()方法清理和转义不足，可能导致存储型跨站脚本攻击。

CVSS 6.4 · Medium EPSS 0.35% · P27

Affected Version Matrix 1

VendorProduct Version RangeStatus
wpdevteam BetterDocs – AI Documentation, Knowledge Base, Docs, Wikis, FAQ with Chatbot ≤ 4.5.3 affected
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I. Basic Information for CVE-2026-12157

Vulnerability Information
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Vulnerability Title
BetterDocs <= 4.5.3 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'blockId' Block Attribute
Source: CVE Program / CVE List V5
Vulnerability Description
The BetterDocs - Knowledge Base Docs & FAQ Solution for Elementor & Block Editor plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the blockId attribute of the betterdocs/category-slate-layout Gutenberg block in versions up to, and including, 4.5.3. This is due to insufficient input sanitization and output escaping in the CategorySlateLayout::render() method, which echoes the blockId block attribute directly into an HTML class attribute without esc_attr(). 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
WPDeveloper BetterDocs 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WPDeveloper BetterDocs是WPDeveloper公司的一个AI文档、知识库和FAQ管理的WordPress插件。 WPDeveloper BetterDocs 4.5.3及之前版本存在跨站脚本漏洞，该漏洞源于CategorySlateLayout::render()方法清理和转义不足，可能导致存储型跨站脚本攻击。
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
wpdevteam BetterDocs – AI Documentation, Knowledge Base, Docs, Wikis, FAQ with Chatbot 0 ~ 4.5.3 -

II. Public POCs for CVE-2026-12157

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III. Intelligence Information for CVE-2026-12157

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Patches & Fixes for CVE-2026-12157 (1)

Security Blog Posts for CVE-2026-12157 (1)

Other References for CVE-2026-12157 (1)

IV. Related Vulnerabilities

Same product: BetterDocs – AI Documentation, Knowledge Base, Docs, Wikis, FAQ with Chatbot
Same vendor: wpdevteam
Same weakness: CWE-79

V. Comments for CVE-2026-12157

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