CVE-2025-13731

Nexter Extension <= 4.4.1 - Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode

MEDIUM
6.4
CVSS Score
Published: December 2, 2025 at 01:53 PM UTC
Updated: October 18, 2026 at 06:10 PM UTC
1 product affected across 1 vendorNexter Extension

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Severity
MEDIUM6.4
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

Description

The Nexter Extension – Site Enhancements Toolkit plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's 'nxt-year' shortcode in all versions up to, and including, 4.4.1 due to insufficient input sanitization and output 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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

0 ≤ v ≤ 4.4.10

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.4MEDIUMWordfence
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-79

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