CVE Catalog

CVE-2025-9129

MediumCVSS 6.4
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.24%

14th percentile - higher than 14% of all known CVEs

Summary

The Flexi plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the flexi-form-tag shortcode in all versions up to and including 4.28. This is due to insufficient input sanitization and output escaping on user-supplied attributes. Authenticated attackers with contributor-level access or higher can inject arbitrary web scripts that execute when a user visits an affected page.

Risk Assessment

The risk involves injection of malicious scripts that can steal user data, hijack sessions, or spread malware. The attack requires a low-privileged account, increasing the likelihood of exploitation.

Recommendation

Immediately update the Flexi plugin to the latest patched version. Additionally, restrict user permissions and regularly audit content published by contributors.

Related vulnerabilities

Original NVD description (English source)

The Flexi plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin for WordPress's flexi-form-tag shortcode in all versions up to, and including, 4.28 due to insufficient input sanitization and output escaping on user supplied attributes. 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.

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