BetterDocs <= 4.5.3 — Authenticated (Contributor+) Stored Cross-Site Scripting via 'blockId' Block Attribute
CVE-2026-12157Published · Updated Action summary
Affected: ≤4.5.3Update to 4.5.4 or newer
All remediation steps- Severity
- Medium6.4
- CVSS
- 6.4CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:NWhat does this vector mean?
AV:NAttack vector- Network
AC:LAttack complexity- Low
PR:LPrivileges required- Low
UI:NUser interaction- None
S:CScope- Changed
C:LConfidentiality- Low
I:LIntegrity- Low
A:NAvailability- None
- Weakness
- CWE-79 Cross-Site Scripting
- Required access
- Unknown
- Exploit prediction (EPSS)
- No score
- CISA KEV
- Not listed
On this page8
Am I affected?
BetterDocs – AI Documentation, Knowledge Base, MCP Server, Docs, Wikis, FAQ & Chatbot betterdocs
- Affected≤ 4.5.3
- Patched in4.5.4
Update to 4.5.4 or newer.
You are affected if you run ≤ 4.5.3. Version 4.5.4 and later are not affected by this issue.
- Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under BetterDocs – AI Documentation, Knowledge Base, MCP Server, Docs, Wikis, FAQ & Chatbot.
- No admin access? Run a passive check of your site. It reads public files only.
What to do
- Update to version 4.5.4, or a newer patched version
- Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
- Watch BetterDocs – AI Documentation, Knowledge Base, MCP Server, Docs, Wikis, FAQ & Chatbot to get an email when the next vulnerability is published.
Advisory
Source description from Wordfence Intelligence, credited to Craniums.
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.
Exploits & references
Proof-of-concept & detection
No public proof-of-concept or detection template is known for this vulnerability.
Advisories & patches
- Advisorywordfence.com
Related CVEs
More in BetterDocs – AI Documentation, Knowledge Base, MCP Server, Docs, Wikis, FAQ & Chatbot
All 15| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| Medium6.4 | Authenticated (Contributor+) Stored Cross-Site Scripting via Heading 'id' Attribute in Post Content ≤4.8.1Update to 4.8.2 | CVE-2026-75980 | |
| Medium6.4 | Authenticated (Contributor+) Stored Cross-Site Scripting ≤4.6.2Update to 4.7.0 | CVE-2026-65562 | |
| Medium6.5 | Authenticated (Custom+) SQL Injection via 'lang' Parameter ≤4.6.0Update to 4.6.1 | CVE-2026-15104 | |
| High7.2 | Unauthenticated Stored Cross-Site Scripting ≤4.5.4Update to 4.5.5 | CVE-2026-11371 | |
| Medium4.3 | Missing Authorization to Authenticated (Subscriber+) Unauthorized AI API Usage ≤4.3.11Update to 4.3.12 | CVE-2026-6393 |
- Medium6.4Authenticated (Contributor+) Stored Cross-Site Scripting via Heading 'id' Attribute in Post Content
≤4.8.1Update to 4.8.2
- Medium6.4Authenticated (Contributor+) Stored Cross-Site Scripting
≤4.6.2Update to 4.7.0
- Medium6.5Authenticated (Custom+) SQL Injection via 'lang' Parameter
≤4.6.0Update to 4.6.1
- High7.2Unauthenticated Stored Cross-Site Scripting
≤4.5.4Update to 4.5.5
- Medium4.3Missing Authorization to Authenticated (Subscriber+) Unauthorized AI API Usage
≤4.3.11Update to 4.3.12
Same weakness (Cross-Site Scripting)
All Cross-Site Scripting| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| High7.2 | Unauthenticated Stored Cross-Site Scripting via Comment User-Agent Header | CVE-2026-120688 | |
| Critical9.8 | Unauthenticated Arbitrary File Upload via File Upload via Public Form Submission | CVE-2026-125055 | |
| Critical9.8 | Unauthenticated PHP Object Injection to Remote Code Execution via 'form' Parameter | CVE-2026-119077 | |
| Medium5.3 | Unauthenticated Sensitive Information Exposure in 'search' Parameter | CVE-2026-121518 |
- High7.2Unauthenticated Stored Cross-Site Scripting via Comment User-Agent Header
EZ SQL Reports Shortcode Widget and DB Backup
≤5.25.25Update to 5.26.45
- Critical9.8Unauthenticated Arbitrary File Upload via File Upload via Public Form Submission
Chatterbug Forms – Fast, Flexible WordPress Form Builder
≤1.0.2Update to 1.1
- Critical9.8Unauthenticated PHP Object Injection to Remote Code Execution via 'form' Parameter
ELEX WordPress HelpDesk & Customer Ticketing System
≤3.3.9Update to 3.4.0
- Medium5.3Unauthenticated Sensitive Information Exposure in 'search' Parameter
Customer Reviews for WooCommerce
≤5.127.0Update to 5.128.0
Timeline
CVE published
Severity medium, CVSS 6.4
Record last updated
Sources & licenses
Wordfence record- Vulnerability data
- Wordfence Intelligence. Copyright 2012-2026 Defiant Inc. Licensed under the CC BY-SA 4.0.
- CVE® identifiers
- Copyright 1999-2026 The MITRE Corporation. Used under the CVE Program. CVE® is a registered trademark of The MITRE Corporation.
- CVSS / CWE
- National Vulnerability Database (NVD), shown unmodified. This product uses the NVD API but is not endorsed or certified by the NVD.
- VulnCrest content
- Summary, remediation guidance and page layout © VulnCrest. Not sourced from NVD.