CVE-2026-27891
HighCVSS 7.2Exploitation Probability (EPSS)
Low risk41th percentile - higher than 41% of all known CVEs
Summary
FacturaScripts versions 2026 and below contain a critical vulnerability in the Plugins::add() function that fails to properly validate file paths within uploaded ZIP archives. This allows a Zip Slip attack, leading to arbitrary file write and remote code execution (RCE) by overwriting sensitive .php files outside the plugins directory.
Risk Assessment
An attacker can remotely overwrite arbitrary files on the server, potentially leading to complete control over the application and server.
Recommendation
Update FacturaScripts to version 2026.1 or later.
Other vulnerabilities in FacturaScripts
See all- CVE-2026-27964Low
FacturaScripts up to version 2025.7 has a Reflected XSS vulnerability via the fsNick cookie parameter. The cookie value is reflected in HTML without sanitization, allowing script execution before redirect. Fixed in version 2025.8.
- CVE-2026-27892Medium
FacturaScripts before version 2026 stores and serves uploaded images without stripping EXIF/XMP/IPTC metadata. Authenticated users can download an image and extract the uploader's personal data such as GPS coordinates, device information, and timestamps.
- CVE-2026-32699Medium
FacturaScripts up to version 2025.92 fails to validate the 'nick' parameter during a POST request to the EditUser controller. Although the UI prevents editing this field, an attacker can intercept the request and modify the parameter to rename any account, including the administrator.
Original NVD description (English source)
FacturaScripts is an open source accounting and invoicing software. Versions 2026 and below contain a critical vulnerability in the Plugins::add() function. The system fails to properly validate the file paths within uploaded ZIP archives. This allows an attacker to perform a Zip Slip attack, leading to Arbitrary File Write and Remote Code Execution (RCE) by overwriting sensitive .php files outside the designated plugins directory. The vulnerability is located in Plugins.php. While the testZipFile function attempts to validate that the ZIP contains only one root folder, it does not sanitize or validate the individual file paths within that folder. An attacker can bypass this check by naming a file ValidPluginName/../../shell.php. The explode function will see ValidPluginName as the root folder, satisfying the count($folders) != 1 check. However, during extraction, the ../../ sequence triggers a path traversal, allowing the file to be written anywhere the web server has permissions the root directory. This issue is fixed in version 2026.1.