CVE-2026-85520: Mypresta Google Merchant Center Feed

Critical severity, CVSS 9.3. EPSS: 1% chance of exploitation in the next 30 days.

Google Merchant Center Feed (gmfeed) module for PrestaShop is vulnerable to unauthenticated arbitrary file write in the feed.php endpoint. An unauthenticated attacker can send a crafted request that controls the output file name, path, extension, and content through request parameters. Due to the lack of authentication and input validation, the request is processed successfully, allowing an attacker to write and execute arbitrary PHP code, resulting in remote code execution (RCE). This issue was fixed in version 2.3.9.

Affected products

• Mypresta Google Merchant Center Feed: from 1.9.1, up to and including 2.3.8

Published 2026-09-29. Last modified 2026-09-30.