Piwigo up to 16.3.0 Installer database.inc addslashes prefix/dbpasswd/dbhost/dbname/dbuser input validation

Summaryinfo

A vulnerability classified as critical has been found in Piwigo up to 16.3.0. This issue affects the function addslashes of the file local/config/database.inc of the component Installer. This manipulation of the argument prefix/dbpasswd/dbhost/dbname/dbuser causes input validation. The identification of this vulnerability is CVE-2026-35048. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability has been found in Piwigo up to 16.3.0 and classified as critical. Affected by this vulnerability is the function addslashes of the file local/config/database.inc of the component Installer. The manipulation of the argument prefix/dbpasswd/dbhost/dbname/dbuser with an unknown input leads to a input validation vulnerability. The CWE definition for the vulnerability is CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

The Piwigo installer in versions 16.3.0 and earlier accepts POST parameters for database configuration and writes them directly into a PHP configuration file without proper sanitization. On PHP 8+, the `addslashes()` protection is bypassed because it checks for `get_magic_quotes_gpc()`, a function removed in PHP 8.0. This allows raw user input to be interpolated directly into PHP source code. An unauthenticated attacker can inject arbitrary PHP code through POST parameters (prefix, dbpasswd, dbhost, dbname, or dbuser), which gets written to `local/config/database.inc.php` and executed on every page load.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-35048 since 03/31/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 07/20/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Type

• Photo Gallery Software

Name

• Piwigo

Version

• 16.0
• 16.1
• 16.2
• 16.3.0

License

• open-source

Website

• Product: https://github.com/Piwigo/Piwigo/

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