CVE-2025-12637: Koopersmith Elastic Theme Editor

High severity, CVSS 8.8. EPSS: 0.6% chance of exploitation in the next 30 days.

The Elastic Theme Editor plugin for WordPress is vulnerable to arbitrary file uploads due to a dynamic code generation feature in the process_theme function in all versions up to, and including, 0.0.3. This makes it possible for authenticated attackers, with Subscriber-level access and above, to upload arbitrary files on the affected site's server which may make remote code execution possible.

Affected products

• Koopersmith Elastic Theme Editor: up to and including 0.0.3

Published 2025-11-11. Last modified 2026-06-17.