CVE-2018-19415
📋 TL;DR
CVE-2018-19415 is a critical SQL injection vulnerability in Plikli CMS that allows remote attackers to execute arbitrary SQL commands via the id parameter in join_group.php or comment_id parameter in story.php. This affects all Plikli CMS 4.0.0 installations, potentially compromising the entire database and server.
💻 Affected Systems
- Plikli CMS
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete database compromise leading to data theft, privilege escalation, and potential remote code execution on the underlying server.
Likely Case
Database content extraction, user credential theft, and unauthorized administrative access to the CMS.
If Mitigated
Limited impact with proper input validation and parameterized queries preventing SQL injection.
🎯 Exploit Status
Exploitation requires no authentication and simple SQL injection techniques can be used.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 4.0.1
Vendor Advisory: https://www.plikli.com/
Restart Required: No
Instructions:
1. Backup your database and files. 2. Download Plikli CMS 4.0.1 or later. 3. Replace vulnerable files (join_group.php, story.php) with patched versions. 4. Verify functionality.
🔧 Temporary Workarounds
Input Validation Filter
allAdd input validation to sanitize id and comment_id parameters before processing.
Modify join_group.php and story.php to validate numeric input: if(!is_numeric($_GET['id'])) { die('Invalid input'); }
WAF Rule
allImplement web application firewall rules to block SQL injection patterns.
Add WAF rule: SecRule ARGS "(?i:(union.*select|select.*from))" "id:1001,phase:2,deny"
🧯 If You Can't Patch
- Implement strict input validation and parameterized queries in affected PHP files.
- Restrict access to vulnerable endpoints using IP whitelisting or authentication requirements.
🔍 How to Verify
Check if Vulnerable:
Test for SQL injection by sending payloads like ' OR '1'='1 to join_group.php?id= parameter.Check Version:
Check Plikli version in admin panel or config files.Verify Fix Applied:
Attempt SQL injection tests after patching; successful queries should be blocked or sanitized.📡 Detection & Monitoring
Log Indicators:
- Unusual SQL errors in web server logs
- Multiple requests with SQL keywords to join_group.php or story.php
Network Indicators:
- HTTP requests containing SQL injection payloads to vulnerable endpoints
SIEM Query:
source="web.log" AND (uri="*join_group.php*" OR uri="*story.php*") AND (query="*union*select*" OR query="*select*from*")