FacturaScripts before version 2026.7 contains a PHP object injection vulnerability in WidgetSelect::processFormData() that allows authenticated attackers to trigger unserialize() on raw POST data without an allowed_classes filter for multiple-select fields. Attackers can submit a serialized XLSXWriter object as the field value to invoke its __destruct() method, deleting arbitrary attacker-specified files such as config.php or backup data, resulting in denial of service and potential application reinstall hijack.
Weakness
The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.
Potential Mitigations
- Make fields transient to protect them from deserialization.
- An attempt to serialize and then deserialize a class containing transient fields will result in NULLs where the transient data should be. This is an excellent way to prevent time, environment-based, or sensitive variables from being carried over and used improperly.
Related Attack Patterns
References
- https://github.com/NeoRazorX/facturascripts/releases/tag/v2026.7
- https://github.com/NeoRazorX/facturascripts/security/advisories/GHSA-p89j-gj6f-fh6g
- https://www.vulncheck.com/advisories/facturascripts-php-object-injection-via-widgetselect
- https://github.com/NeoRazorX/facturascripts/security/advisories/GHSA-p89j-gj6f-fh6g