Unauthorized Data Modification in AffiliateX Amazon Affiliate Plugin for WordPress
CVE-2025-13859

6.4MEDIUM

Key Information:

Vendor

WordPress
Status
Affiliatex – Amazon Affiliate Plugin
Vendor
CVE Published:
15 January 2026

What is CVE-2025-13859?

The AffiliateX – Amazon Affiliate Plugin for WordPress suffers from a vulnerability that allows authenticated users, starting from the Subscriber level, to execute arbitrary JavaScript code. This occurs due to a missing capability check on the save_customization_settings AJAX action, which enables an attacker to store malicious code in the site's backend. The vulnerability affects versions 1.0.0 through 1.3.9.3, posing a significant risk to site integrity as the malignant scripts execute upon rendering any AffiliateX block.

Affected Version(s)

AffiliateX – Amazon Affiliate Plugin 1.0.0 <= 1.3.9.3

References

https://www.wordfence.com/threat-intel/vulnerabilities/id...
https://plugins.trac.wordpress.org/changeset/3420957/affi...
https://plugins.trac.wordpress.org/changeset/3420957/affi...

CVSS V3.1

Score:
6.4
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Kenneth Dunn
.