Simple SEO Slideshow, CVE-2026-8900

CVE, Research URL: CVE-2026-8900
Home page URL: Security reports for Simple SEO Slideshow
Application: Simple SEO Slideshow
Published on: Jun 06, 2026
Research Description: The Simple SEO Slideshow plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Shortcode Attributes in all versions up to, and including, 1.2.8 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. WordPress KSES does not strip malicious shortcode attribute values on post save, allowing contributor-level users to persist payloads that execute for any visitor, including administrators reviewing the post.
Affected versions: max 1.2.9.
Status: vulnerable