CVE-2026-85520 Unauthenticated arbitrary file write leading to RCE in gmfeed PrestaShop module
Unauthenticated attackers can write arbitrary files to the server via the feed.php endpoint, leading to remote code execution.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-85520?
CVE-2026-85520 is a critical vulnerability in MyPresta Google Merchant Center Feed, published on 29 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-73
Which versions are affected by CVE-2026-85520?
How do I fix CVE-2026-85520?
No fix has been published for CVE-2026-85520 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-85520 being exploited?
There is no known exploitation of CVE-2026-85520 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as GHSA-mxmh-vx83-qfxg.