CVE-2026-42323

Piwigo before version 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.

Piwigo before version 16.4.0: admin/element_set_ranks.php stores administrator-controlled image_order[] values without enforcing the existing sort-field whitelist. The stored album image_order expression is later concatenated into ORDER BY clauses by admin/batch_manager_global.php, admin/batch_manager_unit.php, include/section_init.inc.php, and include/ws_functions/pwg.categories.php. When at least one album contains at least one photo, an authenticated administrator can store a crafted expression and trigger it in a later album or Batch Manager query to disclose, modify, or disrupt database data.

Piwigo before v16.4.0 is vulnerable to arbitrary file read and remote code execution in image upload handling when using the Imagick library due to insufficient validation and unsafe processing of user-supplied image files. By abusing format confusion (e.g., disguising SVG content as PNG), an attacker can trigger unintended interpretation of embedded SVG elements that reference local files. In more advanced scenarios, Imagick's support for Magick Scripting Language (MSL) may be abused to process attacker-controlled instructions, potentially leading to unauthorized server-side file writes and remote code execution. This has been patched in 16.4.0.

Piwigo version 2.9.2 is vulnerable to Cross-Site Request Forgery (CSRF) via specific URL parameters. An attacker can coerce an admin user into performing unintended actions.

The admin/configuration.php file in Piwigo version 2.9.2 has a CSRF (Cross-Site Request Forgery) vulnerability. An attacker can exploit this flaw to perform unauthorized actions on behalf of a logged-in user.

CVE-2017-10681 in Piwigo through 2.9.1 has a CSRF vulnerability that allows remote attackers to hijack user authentication for requests to unlock albums via a crafted request.

CVE-2017-10680 is a CSRF vulnerability in Piwigo through version 2.9.1 that allows remote attackers to hijack user authentication to change a private album to public via a crafted request.

Piwigo through 2.9.1 allows remote attackers to obtain sensitive information about the descriptive name of a permalink by examining the redirect URL that is returned in a request for the permalink ID number of a private album. The permalink ID numbers are easily guessed.

The CSRF vulnerability in Piwigo through version 2.9.1 allows remote attackers to hijack user authentication for requests to delete permalinks via a crafted request.

The admin/batch_manager.php file in Piwigo up to version 2.8.3 has a vulnerability that allows remote authenticated administrators to conduct File Inclusion attacks via the $page['tab'] variable (aka the mode parameter).