What’s Vulnerable › Vulnerabilities

CVE-2025-13859: AffiliateX 1.0.0 - 1.3.9.3 - Authenticated (Subscriber+) Missing Authorization to Stored Cross-Site Scripting via save_customization_settings

• Severity: medium (CVSS 6.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-01-15 · updated 2026-06-17
• Weakness: CWE-862

Description

The AffiliateX – Amazon Affiliate Plugin plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the save_customization_settings AJAX action in versions 1.0.0 to 1.3.9.3. This makes it possible for authenticated attackers, with Subscriber-level access and above, to store arbitrary JavaScript that executes whenever an AffiliateX block renders on the site.

Affected products

• wpcenter AffiliateX – Amazon Affiliate Plugin: from 1.0.0 through 1.3.9.3

References

• https://plugins.trac.wordpress.org/changeset/3420957/affiliatex/trunk/includes/functions/AjaxFunctions.php
• https://plugins.trac.wordpress.org/changeset/3420957/affiliatex/trunk/includes/helpers/class-affiliatex-helpers.php
• https://www.wordfence.com/threat-intel/vulnerabilities/id/36d57b8d-7e62-413b-8ea9-87963b8cd469?source=cve

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