CVE Catalog

CVE-2026-13042

HighCVSS 7.2
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.25%

16th percentile - higher than 16% of all known CVEs

Summary

The RPB Chessboard plugin for WordPress up to version 8.1.2 is vulnerable to Stored Cross-Site Scripting via Comment Content due to insufficient input sanitization and output escaping. Unauthenticated attackers can inject arbitrary scripts that execute when users access affected pages.

Risk Assessment

Attackers can inject malicious JavaScript into comments, leading to session theft, redirects, or site defacement for all visitors.

Recommendation

Immediately update the RPB Chessboard plugin to the latest version (above 8.1.2) and deploy a Web Application Firewall (WAF) to block XSS attacks.

Related vulnerabilities

Original NVD description (English source)

The RPB Chessboard plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Comment Content in all versions up to, and including, 8.1.2 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. WordPress's save-time kses sanitization does not mitigate this issue because the crafted payload uses only kses-allowed tags and attributes (such as an <a> element with title and href), and the dangerous attribute-breaking HTML is synthesized entirely at render time by the plugin's own comment_text filter.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS