CVE Catalog

CVE-2026-2422

MediumCVSS 6.4
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.21%

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

Summary

The WP Composer – The Easiest Page Builder plugin for WordPress in versions up to and including 1.0.5 is vulnerable to Stored Cross-Site Scripting via the 'pbwp_raw_shortcode' shortcode due to the shortcode handler decoding Base64-encoded content and outputting it directly without any sanitization or escaping. Authenticated attackers with Contributor-level access and above can inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The Base64 encoding allows the payload to bypass WordPress's KSES content filtering at save time.

Risk Assessment

An attacker can execute arbitrary JavaScript in the victim's browser, potentially leading to session theft, redirects, or other actions in the context of a logged-in user. This can affect multiple site users.

Recommendation

Update the WP Composer plugin to a version later than 1.0.5. Until then, restrict Contributor privileges and monitor for unusual content.

Related vulnerabilities

Original NVD description (English source)

The WP Composer – The Easiest Page Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'pbwp_raw_shortcode' shortcode in all versions up to, and including, 1.0.5. This is due to the shortcode handler decoding Base64-encoded content and outputting it directly without any sanitization or escaping. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The Base64 encoding allows the payload to bypass WordPress's KSES content filtering at save time, since the encoded string contains no harmful HTML characters.

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