Otter Blocks – Gutenberg Blocks, Page Builder for Gutenberg Editor & FSE <= 3.2.9 - Authenticated (Contributor+) Stored Cross-Site Scripting via Dynamic Magic Tags in HTML Attributes
- ID
- WPSEC-2026-2811
- Plugin
- Otter Blocks – Gutenberg Blocks, Page Builder for Gutenberg Editor & FSE (otter-blocks)
- Affected
- from 2.1.1 before 3.2.10
- Remediation
- Update to 3.2.10 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 Medium · Affected versions Medium among sites WPSec scans, 2026-11-10
- Attack surface
- Otter Blocks – Gutenberg Blocks, Page Builder for Gutenberg Editor & FSE on WPSec AttackSurface
- Fix released
- Published
Description
The Otter Blocks plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Dynamic Content magic tags placed inside HTML attributes in all versions up to, and including, 3.2.9, due to resolved magic tag values being only attribute-escaped, with no protocol check on URL attributes, no style sanitization, and no removal of event-handler or srcdoc attributes. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts (for example, a javascript: URL resolved into a link's href) in pages that will execute whenever a user accesses an injected page.
References
- https://wpsec.com/vuln/WPSEC-2026-2811/
- https://plugins.svn.wordpress.org/otter-blocks/tags/3.2.10/
- https://wordpress.org/plugins/otter-blocks/
Published by WPSec. Provided as is, without warranty. Corrections: contact us.
This advisory as JSON or Markdown · All advisories: JSON, RSS