Vulnerability · Published Jun 19, 2026 · Assigned by Wordfence

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

Medium 6.4

In plain English

A medium-severity cross-site scripting in BetterDocs – AI Documentation, Knowledge Base, Docs, Wikis, FAQ with Chatbot from wpdevteam. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 29% of all known vulnerabilities).

Severity (CVSS 3.1)6.4Medium

Exploit odds (30 days)0.3%top 71.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
wpdevteam	BetterDocs – AI Documentation, Knowledge Base, Docs, Wikis, FAQ with Chatbot	0 – through 4.5.3

Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

In plain English

Official description

Affected products (as reported)

References