---
id: CVE-2025-13739
title: >-
  The CryptX plugin for WordPress is vulnerable to Stored Cross-Site Scripting
  via the plugin's `cryptx` shortcode in all versions up to, and including,
  4.0.5 due to insufficient input sanitization and output escaping on user
  supplied attr…
summary: >-
  The CryptX plugin for WordPress is vulnerable to Stored Cross-Site Scripting
  via the plugin's `cryptx` shortcode in all versions up to, and including,
  4.0.5 due to insufficient input sanitization and output escaping on user
  supplied attr…
severity: medium
cvss: 6.4
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N'
cwe:
  - CWE-79
published: '2025-12-05'
updated: '2026-09-25'
sourceUpdated: '2026-09-25T23:10:00.463'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-13739'
references:
  - url: >-
      https://plugins.trac.wordpress.org/browser/cryptx/tags/4.0.4/classes/CryptX.php#L1295
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/cryptx/tags/4.0.4/classes/CryptX.php#L149
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/cryptx/tags/4.0.4/classes/CryptX.php#L237
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/cryptx/tags/4.0.4/classes/CryptX.php#L604
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3416363%40cryptx&new=3416363%40cryptx&sfp_email=&sfph_mail=
    label: security@wordfence.com
  - url: >-
      https://www.wordfence.com/threat-intel/vulnerabilities/id/2f8cb7d7-eb40-403e-85de-c16200ee424d?source=cve
    label: security@wordfence.com
tags:
  - nvd
epss: 0.00304
epssPercentile: 0.20653
ingestedAt: '2026-09-25T23:21:16.892Z'
---

## Overview

The CryptX plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's `cryptx` shortcode in all versions up to, and including, 4.0.5 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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.