Weaver Show Posts <= 1.8.1 - Authenticated (Administrator+) Stored Cross-Site Scripting via 'Additional Classes to Wrap Posts' Widget Setting
Published Mar 21, 2026
4.4
MEDIUMCVSS 3.1
EPSS 0.20%
Description
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 supplied attributes. This makes it possible for authenticated attackers, with Administrator-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This primarily affects multisite installations where Administrators do not have the unfiltered_html capability.
Affected products
-
- Version 0StatusaffectedConstraints<=1.8.1
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Wpweaver | Weaver Show Posts | unaffected |
|
No data.
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
References (7)
- https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-14151 Advisory
- https://plugins.trac.wordpress.org/browser/show-posts/tags/1.8.1/includes/posts-widgets.php#L32
- https://plugins.trac.wordpress.org/browser/show-posts/tags/1.8.1/includes/posts-widgets.php#L45
- https://plugins.trac.wordpress.org/browser/show-posts/trunk/includes/posts-widgets.php#L32
- https://plugins.trac.wordpress.org/browser/show-posts/trunk/includes/posts-widgets.php#L45
- https://www.wordfence.com/threat-intel/vulnerabilities/id/e0d525ab-a86d-4750-9d16-731cbc0a626e?source=cve
- https://youtu.be/kbSqUuEAyho
Change history (0)
No recorded changes yet.