Stored Cross-Site Scripting in Weaver Show Posts Plugin for WordPress

CVE-2026-2121

What is CVE-2026-2121?

The Weaver Show Posts plugin for WordPress contains a vulnerability that allows authenticated users with Administrator-level access to perform Stored Cross-Site Scripting attacks. This issue arises from insufficient input sanitization and output escaping related to the 'add_class' parameter. Attackers can inject arbitrary web scripts, which execute whenever a user accesses the manipulated page, posing significant risks—especially in multisite installations where specific Administrator capabilities may be limited.

Human OS v1.0:
Ageing Is an Unpatched Zero-Day Vulnerability.

Remediate biological technical debt. Prime Ageing uses 95% high-purity SIRT6 activation to maintain genomic integrity and bolster systemic resilience.

Deploy the Patch →

References