SchemaEngine AI – AI Schema Markup, Reviews & Rich Snippets for SEO <= 3.1.1 - Unauthenticated Denial of Service via 'max_page' Parameter
- ID
- WPSEC-2026-0976
- Plugin
- SchemaEngine AI – AI Schema Markup, Reviews & Rich Snippets for SEO (review-schema)
- Affected
- all versions before 3.1.2
- Remediation
- Update to 3.1.2 or later.
- CVSS 3.1
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
- Weakness
- CWE-400
- Usage
- Plugin Low · Affected versions Low among sites WPSec scans, 2026-10-15
- Attack surface
- SchemaEngine AI – AI Schema Markup, Reviews & Rich Snippets for SEO on WPSec AttackSurface
- Fix released
- Published
Description
The SchemaEngine AI – AI Schema Markup, Reviews & Rich Snippets for SEO plugin for WordPress is vulnerable to Denial of Service via the 'max_page' parameter of the rtrs_pagination AJAX action in all versions up to, and including, 3.1.1. This is due to the handler, which is registered for unauthenticated users, using the client-supplied page count without any upper bound when no sort order is given and passing it to paginate_links(), which loops once for every page. This makes it possible for unauthenticated attackers, using the nonce printed on any front-end page with reviews, to send requests that each keep a PHP worker busy until the execution time limit, consuming server resources and degrading site availability.
References
- https://wpsec.com/vuln/WPSEC-2026-0976/
- https://plugins.svn.wordpress.org/review-schema/tags/3.1.2/
- https://wordpress.org/plugins/review-schema/
Published by WPSec. Provided as is, without warranty. Corrections: contact us.
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