CVE-2026-47693: Poweradmin CSV Injection Vulnerability

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-3h6h-67x3-cv5x",
  "modified" : "2026-07-20T21:22:23Z",
  "published" : "2026-06-08T23:04:25Z",
  "aliases" : [ "CVE-2026-47693" ],
  "summary" : "Poweradmin: CSV Injection in log export endpoints allows formula execution in spreadsheet applications",
  "details" : "Description:\n\n### Summary\n\nPoweradmin v4.4.0 is vulnerable to CSV Injection (Formula Injection) in its log export functionality. User-controlled data — specifically the username field — is written to exported CSV files without sanitizing formula trigger characters (=, +, -, @). When an administrator exports activity logs and opens the resulting CSV in a spreadsheet application (Microsoft Excel, LibreOffice Calc, Google Sheets), any formula stored in a username is executed by the application. This can be used for phishing attacks against administrators or data exfiltration.\n\n### Details\n\nThe vulnerability exists in all four log export controllers:\n\n- `lib/Application/Controller/ListLogUsersController.php` (lines 188, 194)\n- `lib/Application/Controller/ListLogZonesController.php`\n- `lib/Application/Controller/ListLogGroupsController.php`\n- `lib/Application/Controller/ListLogApiController.php`\n\nThese controllers export database rows via `fputcsv()` without applying any formula injection countermeasures. The `user` column contains the username of the actor who performed the operation, and the `username` column (in user logs) contains the username of the affected account. Both fields are written verbatim to the CSV output.\n\nA username such as `=1+1` is written **without CSV enclosure quotes** (because it contains no commas or quotes), so spreadsheet applications treat it directly as a formula. A username containing commas or quotes (e.g. `=HYPERLINK(\"http://attacker.com\",\"Click here\")`) is enclosed in CSV quotes with internal quotes doubled, but spreadsheet applications still evaluate the cell value as a formula since it begins with `=`.\n\nAdditionally, PHP deprecation warnings are emitted directly into the HTTP response body before CSV headers, exposing internal file paths (e.g. `/app/lib/Application/Controller/ListLogUsersController.php`) — a secondary information disclosure issue (CWE-209). This also corrupts the CSV file when PHP error reporting is enabled.\n\n### PoC\n\n**Prerequisites:** An account with `user_add_new` permission (administrator role).\n\n**Steps to reproduce:**\n\n1. Log in as administrator.\n2. Navigate to Add User and create an account with:\n   - Username: `=HYPERLINK(\"http://attacker.com\",\"Confirm Identity\")`\n   - Any valid email and password\n3. Log out, then log in with the newly created account to generate a log entry.\n4. Log back in as administrator.\n5. Navigate to `/users/logs` and click Export CSV.\n6. Open the downloaded CSV file in Microsoft Excel or LibreOffice Calc.\n\n**Result:** Excel renders a clickable hyperlink labeled \"Confirm Identity\" pointing to `http://attacker.com` in the `user` column of the log entry. With the simpler username `=1+1`, the cell displays `2` instead of the literal text, confirming formula execution.\n\nConfirmed on Poweradmin v4.4.0 (Docker image `poweradmin/poweradmin:latest`).\n\n### Impact\n\nThis is a CSV Injection vulnerability (CWE-1236). It affects any administrator who exports activity logs to CSV and opens the file in a spreadsheet application.\n\n**Attack scenarios:**\n\n- **Phishing:** A malicious actor with the ability to create user accounts sets a formula username that renders as a convincing link in the exported report, tricking a higher-privileged administrator into clicking it.\n- **Data exfiltration:** Using `=IMPORTXML()` in Google Sheets or similar, adjacent cell data (log contents) can be sent to an attacker-controlled server silently when the sheet is opened.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "poweradmin/poweradmin"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "4.2.4"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "poweradmin/poweradmin"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "4.3.0"
      }, {
        "fixed" : "4.3.3"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/poweradmin/poweradmin/security/advisories/GHSA-3h6h-67x3-cv5x"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-47693"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/poweradmin/poweradmin"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/poweradmin/poweradmin/releases/tag/v4.2.4"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/poweradmin/poweradmin/releases/tag/v4.3.3"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-1236" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-06-08T23:04:25Z",
    "nvd_published_at" : "2026-06-23T23:16:49Z"
  }
}