XSS in Wpweaver Weaver Show Posts
CVE-2026-2121
The Weaver Show Posts plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'add_class' parameter in all versions up to, and including, 1.8.1. This is due to insufficient input sanitization and output escaping on user s…
Vulnerability class: XSS (Cross-Site Scripting)
EPSS: 0.001 (15.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 4.4 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N.
Affected products
- Wpweaver Weaver Show Posts — versions 0
Weakness classification (CWE)
References
- www.wordfence.com/threat-intel/vulnerabilities/id/e0d525ab-a86d-4750-9d16-731cb…
- plugins.trac.wordpress.org/browser/show-posts/trunk/includes/posts-widgets.php
- plugins.trac.wordpress.org/browser/show-posts/tags/1.8.1/includes/posts-widgets…
- plugins.trac.wordpress.org/browser/show-posts/trunk/includes/posts-widgets.php
- plugins.trac.wordpress.org/browser/show-posts/tags/1.8.1/includes/posts-widgets…
- youtu.be/kbSqUuEAyho
Frequently asked questions
- What is CVE-2026-2121?
- CVE-2026-2121 is a medium-severity vulnerability in Wpweaver Weaver Show Posts, classified under Cross-site Scripting. CVSS score: 4.4/10. Published 2026-03-21.
- How severe is CVE-2026-2121?
- Medium severity. CVSS v3 base score is 4.4 out of 10.