CVE-2026-27012: Devcode it/openstamanager OpenSTAManager Affected By Unauthenticated Privilege Vulnerability

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-247v-7cw6-q57v",
  "modified" : "2026-03-03T17:43:49Z",
  "published" : "2026-03-03T17:43:49Z",
  "aliases" : [ "CVE-2026-27012" ],
  "summary" : "OpenSTAManager affected by unauthenticated privilege escalation via modules/utenti/actions.php",
  "details" : "### 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" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "devcode-it/openstamanager"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "2.9.8"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/devcode-it/openstamanager/security/advisories/GHSA-247v-7cw6-q57v"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/devcode-it/openstamanager"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-306" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-03-03T17:43:49Z",
    "nvd_published_at" : null
  }
}