CVE Catalog

CVE-2026-12108

MediumCVSS 4.4
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.21%

11th percentile - higher than 11% of all known CVEs

Summary

The Highlighting Code Block plugin for WordPress up to version 2.2.0 is vulnerable to stored cross-site scripting via admin settings due to insufficient input sanitization and output escaping.

Risk Assessment

An authenticated attacker with administrator-level permissions can inject arbitrary scripts that execute whenever a user accesses the compromised page. This affects only multi-site installations and those where unfiltered_html is disabled.

Recommendation

Update the Highlighting Code Block plugin to the latest available version immediately. For multi-site installations, consider further restricting administrator privileges.

Related vulnerabilities

Original NVD description (English source)

The Highlighting Code Block plugin for WordPress is vulnerable to Stored Cross-Site Scripting via admin settings in all versions up to, and including, 2.2.0 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-level permissions and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This only affects multi-site installations and installations where unfiltered_html has been disabled.

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