{"id":"GHSA-247v-7cw6-q57v","aliases":["CVE-2026-27012"],"title":"OpenSTAManager affected by unauthenticated privilege escalation via modules/utenti/actions.php","description":"### Summary\nA privilege escalation and authentication bypass vulnerability in OpenSTAManager allows any attacker to arbitrarily change a user's group (`idgruppo`) by directly calling `modules/utenti/actions.php`. This can promote an existing account (e.g. agent) into the Amministratori group as well as demote any user including existing administrators.\n\n### Details\n`modules/utenti/actions.php` is reachable directly via `http://<IP>:8080/modules/utenti/actions.php` and processes privileged information without requiring any authentication or authorization checks on fields like idgruppo. As a result, an attacker can submit a crafted POST request that updates the targets record and assigns it to the administrator group.\n\nThe file explicitly sets:\n```PHP\n$skip_permissions = true;\ninclude_once __DIR__.'/../../core.php';\n```\n`core.php` then invokes:\n\n```PHP\nPermissions::skip();\n```\nThus, disabling any authentication and permission enforcement. As a result, this file processes operations based on the `op` parameter in the POST request, not only `update_user`. Sensitive fields like `idgruppo` and others can be updated without verifying anything.\n\n### PoC\nA target username exists, such as \"agent\" with an ID of 4. No authentication or cookies are required. Send the following POST request via Burp Suite or similar:\n<img width=\"1094\" height=\"255\" alt=\"image\" src=\"https://github.com/user-attachments/assets/2e8cb148-1b5d-4e5c-9c73-05ed75d64188\" />\nThe target's group is updated in the database.\nVerify the changes in the database before and after the POST request:\n<img width=\"1053\" height=\"430\" alt=\"image\" src=\"https://github.com/user-attachments/assets/49f63ca0-8a04-4dd1-b27c-69699d2ce26f\" />\nChanges also visible in the administrator panel, they have been moved from the Agenti group to Amministratori.\n\n### Impact\nAn unauthenticated attacker can assign administrator privileges to existing users, modify group memberships, enable/disable accounts and other operations that are exposed in the file. This can lead to a full compromise of the application.","severity":"critical","score":9.8,"published":"2026-03-03T17:43:49.000Z","modified":"2026-03-04T15:12:09.814Z","withdrawn":false,"knownExploited":false,"affected":[{"ecosystem":"Packagist","name":"devcode-it/openstamanager","ranges":[{"events":[{"introduced":"0"},{"last_affected":"2.9.8"}],"type":"ECOSYSTEM"}],"versions":["2.3.0","v2.4","v2.4.1","v2.4.10","v2.4.11","v2.4.12","v2.4.13","v2.4.14","v2.4.15","v2.4.16","v2.4.17","v2.4.17.1","v2.4.18","v2.4.19","v2.4.2","v2.4.20","v2.4.21","v2.4.22","v2.4.23","v2.4.24","v2.4.25","v2.4.26","v2.4.27","v2.4.28","v2.4.29","v2.4.3","v2.4.30","v2.4.31","v2.4.32","v2.4.33","v2.4.34","v2.4.35","v2.4.36","v2.4.37","v2.4.38","v2.4.39","v2.4.4","v2.4.40","v2.4.41","v2.4.42","v2.4.43","v2.4.44","v2.4.45","v2.4.46","v2.4.47","v2.4.48","v2.4.49","v2.4.5","v2.4.50","v2.4.51","v2.4.52","v2.4.53","v2.4.54","v2.4.6","v2.4.7","v2.4.8","v2.4.9","v2.5","v2.5.1-beta","v2.5.2-beta","v2.5.3","v2.5.4","v2.5.5","v2.5.6","v2.5.7","v2.6-beta","v2.6.1","v2.6.2","v2.7","v2.7-beta","v2.7.1","v2.7.2","v2.7.3","v2.8-beta","v2.8.1","v2.8.2","v2.8.3","v2.9","v2.9-beta","v2.9.1","v2.9.2","v2.9.3","v2.9.4","v2.9.5","v2.9.6","v2.9.7","v2.9.8"],"fixed":[]}],"references":["https://github.com/devcode-it/openstamanager/security/advisories/GHSA-247v-7cw6-q57v","https://github.com/devcode-it/openstamanager"],"sources":[{"name":"OSV","id":"GHSA-247v-7cw6-q57v","modified":"2026-03-04T15:12:09.814047Z","url":"https://osv.dev/vulnerability/GHSA-247v-7cw6-q57v"}],"assessments":[{"source":"OSV","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8}]}