Gutenberg Blocks – PublishPress Blocks Controls, Visibility, Reusable Blocks <= 3.7.6 - Authenticated (Author+) Stored Cross-Site Scripting via Content Display Block Post Text Excerpt
- ID
- WPSEC-2026-3104
- Plugin
- PublishPress Blocks – Block Controls, Block Visibility, Block Permissions (advanced-gutenberg)
- Affected
- all versions before 3.7.7
- Remediation
- Update to 3.7.7 or later.
- CVSS 3.1
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
- Weakness
- CWE-79
- Usage
- Plugin Low · Affected versions Low among sites WPSec scans, 2026-11-13
- Attack surface
- Gutenberg Blocks – PublishPress Blocks Controls, Visibility, Reusable Blocks on WPSec AttackSurface
- Fix released
- Published
Description
The PublishPress Blocks plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the post text excerpt of the Content Display (Recent Posts) block in all versions up to, and including, 3.7.6. This is due to insufficient output escaping: the advgbExtractHtml() function strips tags from post content and then decodes HTML entities, and the result is printed without escaping. This makes it possible for authenticated attackers, with author-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses a page that shows their published post in a Content Display block.
References
- https://wpsec.com/vuln/WPSEC-2026-3104/
- https://plugins.svn.wordpress.org/advanced-gutenberg/tags/3.7.7/
- https://wordpress.org/plugins/advanced-gutenberg/
Published by WPSec. Provided as is, without warranty. Corrections: contact us.
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