CVE-2026-85520 (GCVE-0-2026-85520)

Vulnerability from cvelistv5 – Published: 2026-09-29 11:28 – Updated: 2026-09-29 15:01 X_Known Exploited Vulnerability
VLAI Previdian
Title
Unauthenticated arbitrary file write leading to RCE in gmfeed PrestaShop module
Summary
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.
Severity
9.3 (Critical)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-29 15:00 UTC
CWE
  • CWE-73 - External control of file name or path
Assigner
References
Impacted products
Vendor Product Version CPE status
MyPresta Google Merchant Center Feed Affected: 1.9.1 , ≤ 2.3.8 (semver)
guessed Create a notification for this product.
Date Public
2026-09-29 00:00
Credits
Today Group sp. z o.o.
Previdian
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 4d20aa8a-6177-4f53-8598-87bdf2fef32b

Vulnerability ID: CVE-2026-85520

Status: Confirmed

Status Updated: 2026-09-29 11:40 UTC

Exploited: Yes

Timestamps
First Seen: 2026-09-29
Asserted: 2026-09-29
Scope
Notes: Unauthenticated arbitrary file write leading to RCE in gmfeed PrestaShop module | Affected: MyPresta / Google Merchant Center Feed | CVSS: 9.3 (CRITICAL) | Used in malware: unknown | Not yet in CISA KEV: True
Evidence

Type: Public Report

Signal: Successful Exploitation

Confidence: 70%

Source: previdian

Details
Feed Previdian (previdian.com)
Title Unauthenticated arbitrary file write leading to RCE in gmfeed PrestaShop module
Cve Id CVE-2026-85520
Vendor MyPresta
Ghsa Id GHSA-MXMH-VX83-QFXG
Product Google Merchant Center Feed
Added Date 2026-09-29T11:40:26.621Z
Cvss Score 9.3
Epss Score None
Previous Ids
Cvss Severity CRITICAL
Virtual Patch False
Cvss Estimated False
Epss Percentile None
Used In Malware unknown
Vulnerability Id CVE-2026-85520
Ahead Of Cisa Kev None
Not Yet In Cisa Kev True
References
Created: 2026-09-30 12:00 UTC | Updated: 2026-09-30 12:00 UTC
Show details on NVD website
To clipboard 

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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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