PT-2025-48686 · WordPress · Nexter Extension – Site Enhancements Toolkit

Published 2025-12-02 · Updated 2025-12-02 · CVE-2025-13731

Positive Technologies (AI Summary)

CVSS v3.1

6.4

Medium

Base vector

AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Name of the Vulnerable Software and Affected Versions Nexter Extension – Site Enhancements Toolkit plugin for WordPress versions through 4.4.1

Description The Nexter Extension – Site Enhancements Toolkit plugin for WordPress is susceptible to Stored Cross-Site Scripting through the 'nxt-year' shortcode. Insufficient input sanitization and output escaping allow authenticated attackers with Contributor-level access or higher to inject arbitrary web scripts into pages. These scripts will execute when a user accesses the affected page.

Recommendations Update the Nexter Extension – Site Enhancements Toolkit plugin to a version later than 4.4.1.

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2025-13731

Affected Products

Nexter Extension – Site Enhancements Toolkit

References · 6

• https://nvd.nist.gov/vuln/detail/CVE-2025-13731 · Security Note
• https://twitter.com/CVEnew/status/1995860135088951769 · Twitter Post
• https://plugins.trac.wordpress.org/browser/nexter-extension/trunk/include/class-nexter-load-ext.php#L66 · Note
• https://plugins.trac.wordpress.org/changeset?old=3402155&old_path=nexter-extension%2Ftags%2F4.4.1%2Finclude%2Fclass-nexter-load-ext.php&new=3403967&new_path=nexter-extension%2Ftags%2F4.4.2%2Finclude%2Fclass-nexter-load-ext.php · Note
• https://wordfence.com/threat-intel/vulnerabilities/id/809cd97c-22ea-49e7-be46-688fefe50236?source=cve · Note
• https://plugins.trac.wordpress.org/browser/nexter-extension/trunk/include/class-nexter-load-ext.php#L136 · Note