CVE-2026-2546
📋 TL;DR
This is a cross-site scripting (XSS) vulnerability in LigeroSmart up to version 6.1.26 that allows attackers to inject malicious scripts via the SortBy parameter in /otrs/index.pl. The vulnerability can be exploited remotely without authentication, potentially affecting any LigeroSmart instance with internet exposure. Users of affected versions are at risk of session hijacking, credential theft, or website defacement.
💻 Affected Systems
- LigeroSmart
📦 What is this software?
Ligerosmart by Ligerosmart
⚠️ Risk & Real-World Impact
Worst Case
Attackers could steal administrator credentials, hijack user sessions, deface the application, or redirect users to malicious sites, potentially leading to complete system compromise.
Likely Case
Attackers inject malicious JavaScript to steal session cookies or credentials from authenticated users, enabling account takeover or privilege escalation.
If Mitigated
With proper input validation and output encoding, the attack would fail to execute malicious scripts, limiting impact to failed exploitation attempts.
🎯 Exploit Status
Exploit details are publicly available in GitHub issue #283, making this easily exploitable by attackers with basic web security knowledge.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None available
Restart Required: No
Instructions:
No official patch available. Monitor the LigeroSmart GitHub repository for updates. Consider upgrading to any version above 6.1.26 if released.
🔧 Temporary Workarounds
Input Validation Filter
allImplement server-side input validation to sanitize the SortBy parameter, rejecting or encoding any script tags or special characters.
# Add input validation in your application code for SortBy parameter
# Example Perl: $SortBy =~ s/[^a-zA-Z0-9_]//g;
Web Application Firewall (WAF) Rule
allDeploy WAF rules to block requests containing malicious script patterns in the SortBy parameter.
# Example ModSecurity rule: SecRule ARGS:SortBy "@rx <script" "id:1001,phase:2,deny"
🧯 If You Can't Patch
- Implement Content Security Policy (CSP) headers to restrict script execution sources
- Disable or restrict access to /otrs/index.pl endpoint if not required
🔍 How to Verify
Check if Vulnerable:
Test by injecting a simple XSS payload like <script>alert('XSS')</script> into the SortBy parameter of /otrs/index.pl and check if it executes.Check Version:
Check LigeroSmart version in administration interface or via package manager: rpm -qa | grep ligerosmart or dpkg -l | grep ligerosmartVerify Fix Applied:
After applying workarounds, retest with XSS payloads to ensure they are properly sanitized or blocked.📡 Detection & Monitoring
Log Indicators:
- HTTP requests to /otrs/index.pl with suspicious SortBy parameters containing script tags or JavaScript code
- Unusual increase in requests to vulnerable endpoint
Network Indicators:
- HTTP traffic patterns showing repeated requests with encoded script payloads in parameters
SIEM Query:
source="web_logs" AND uri_path="/otrs/index.pl" AND (query_string="*<script*" OR query_string="*javascript:*")