CVE-2026-12157— BetterDocs <= 4.5.3 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'blockId' Block Attribute
Possible ATT&CK Techniques 2AI
T1059 · Command and Scripting Interpreter T1189 · Drive-by CompromiseAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| 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: NVD (National Vulnerability Database)
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: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Source: NVD (National Vulnerability Database)
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: NVD (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
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POCPremium
No public POC found.
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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 vendor: wpdevteam
- CVE-2026-10833
Gutenberg Essential Blocks - Page Builder for Gutenberg Bloc - CVE-2026-7796
EmbedPress <= 4.5.3 - Authenticated (Contributor+) Stored Cr - CVE-2026-7665
Essential Addons for Elementor <= 6.6.4 - Missing Authorizat - CVE-2026-10586
Gutenberg Essential Blocks – Page Builder for Gutenberg Bloc - CVE-2026-5193
Essential Addons for Elementor – Popular Elementor Templates
Same weakness: CWE-79
- CVE-2026-57656
WordPress Hester Core plugin <= 1.1.8 - Cross Site Scripting - CVE-2026-57651
WordPress Ghost Kit plugin <= 3.6.0 - Cross Site Scripting ( - CVE-2026-57650
WordPress Magazine Blocks plugin <= 1.8.3 - Cross Site Scrip - CVE-2026-57638
WordPress Fluent Booking plugin <= 2.1.0 - Cross Site Script - CVE-2026-57629
WordPress StatCounter plugin <= 2.1.1 - Cross Site Scripting
V. Comments for CVE-2026-12157
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