CVE-2026-2121

MediumCVSS 4.4/10Last modified Jun 17, 2026

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.

Metrics

CVSS 3.1 4.4/10CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N

Weakness enumeration

CWE-79

Affected software

No affected versions have been published.

Timeline

Published
Mar 21, 2026
Last modified
Jun 17, 2026
NVD status
Deferred

Related CVEs from 2026

CVE-2026-212187.5Improper handling of missing special element in .NET allows an unauthorized attacker to perform spoofing over a network.CVE-2026-212197.0Use after free in Inbox COM Objects allows an unauthorized attacker to execute code locally.CVE-2026-21229.8A security flaw has been discovered in Xiaopi Panel up to 20260126. This impacts an unknown function of the file /demo.php of the component CVE-2026-212217.0Concurrent execution using shared resource with improper synchronization ('race condition') in Capability Access Management Service (camsvc)CVE-2026-212225.5Insertion of sensitive information into log file in Windows Kernel allows an authorized attacker to disclose information locally.CVE-2026-212237.1Improper privilege management in Microsoft Edge (Chromium-based) allows an authorized attacker to bypass a security feature locally.CVE-2026-212247.8Stack-based buffer overflow in Azure Connected Machine Agent allows an authorized attacker to elevate privileges locally.CVE-2026-212267.5Deserialization of untrusted data in Azure Core shared client library for Python allows an authorized attacker to execute code over a networCVE-2026-212279.8Improper limitation of a pathname to a restricted directory ('path traversal') in Azure Logic Apps allows an unauthorized attacker to elevatCVE-2026-212288.1Improper certificate validation in Azure Local allows an unauthorized attacker to execute code over a network.CVE-2026-212298.8Improper input validation in Power BI allows an authorized attacker to execute code over a network.CVE-2026-21237.8A security audit identified a privilege escalation vulnerability in Operations Agent(<=OA 12.29) on Windows. Under specific conditions Opera
CVE-2026-2121: Medium severity, CVSS 4.4 | Vulnix