Piwigo is a full featured open source photo gallery application for the web. Prior to 16.4.0, check_upgrade_access_rights() in admin/include/functions_upgrade.php conditionally escapes the submitted username only when the removed get_magic_quotes_gpc function exists, so PHP 8 and later concatenate an unauthenticated username directly into the upgrade authentication SQL query. When database upgrades are pending, a crafted query result can satisfy the status and password checks, set PHPWG_IN_UPGRADE, and authorize upgrade execution without valid administrator credentials.
This can cause unauthorized database integrity changes and service disruption. This vulnerability is fixed in 16.4.0.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
High
Difficult to exploit
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service
CVSS Vector v3.1
Weakness Type (CWE)
References 4
https://github.com/Piwigo/Piwigo/commit/1ff9d04534feb5f8f3cc2d3613c0fe8b51a1c0ba
security-advisories@github.com
https://github.com/Piwigo/Piwigo/commit/2cfa7a3d194c8b95edde43038d8f5be5a359e785
security-advisories@github.com
https://github.com/Piwigo/Piwigo/releases/tag/16.4.0
security-advisories@github.com
https://github.com/Piwigo/Piwigo/security/advisories/GHSA-6wj3-7fhw-gfpm
security-advisories@github.com