VULNERABILITY INTELLIGENCE
CVE-2026-8900
CVSS score6.4 MEDIUM
EPSS probability0.19%
CISA KEVNot currently listed
Published2026-06-06
Last modified2026-07-23
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
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.
Weakness classification
- security@wordfence.com: CWE-79