CVE-2026-2545: LigeroSmart XSS Vulnerability

CVE-2026-2545 Overview

A Cross-Site Scripting (XSS) vulnerability has been identified in LigeroSmart, an open-source service management platform. The vulnerability affects the /otrs/index.pl?Action=AgentTicketSearch endpoint, where improper handling of the Profile argument allows attackers to inject malicious scripts. This manipulation of the Profile parameter enables stored or reflected XSS attacks that can be initiated remotely by authenticated users.

Critical Impact

Attackers can inject and execute arbitrary JavaScript code in the context of authenticated user sessions, potentially leading to session hijacking, credential theft, and unauthorized actions within the LigeroSmart ticketing system.

Affected Products

• LigeroSmart versions up to and including 6.1.26
• LigeroSmart deployments using the AgentTicketSearch functionality
• Environments with exposed /otrs/index.pl endpoints

Discovery Timeline

• February 16, 2026 - CVE-2026-2545 published to NVD
• February 19, 2026 - Last updated in NVD database

Technical Details for CVE-2026-2545

Vulnerability Analysis

This vulnerability is classified as CWE-79 (Improper Neutralization of Input During Web Page Generation), commonly known as Cross-Site Scripting (XSS). The vulnerability exists within the AgentTicketSearch module of LigeroSmart, specifically in how the application processes the Profile parameter submitted to /otrs/index.pl.

When a user interacts with the ticket search functionality, the Profile argument is not properly sanitized before being rendered in the response. This allows an attacker with low-level privileges to craft malicious input containing JavaScript code that will execute in the browser context of any user who views the affected page.

The vulnerability requires user interaction, as the victim must navigate to or interact with the page containing the injected payload. The exploit has been publicly disclosed and documented in the GitHub Issue Tracker, increasing the risk of exploitation in the wild.

Root Cause

The root cause of CVE-2026-2545 lies in insufficient input validation and output encoding within the AgentTicketSearch module. The Profile parameter accepts user-supplied input that is subsequently reflected or stored without proper HTML entity encoding or script sanitization. This failure to neutralize special characters such as <, >, ", and ' allows attackers to break out of the intended HTML context and inject executable script content.

Attack Vector

The attack is network-based, requiring an authenticated attacker to submit a crafted request to the /otrs/index.pl?Action=AgentTicketSearch endpoint with a malicious payload in the Profile parameter. The attack scenario typically involves:

1. An authenticated attacker with low-level privileges crafts a URL or form submission containing XSS payload in the Profile parameter
2. The malicious input is processed by the server without proper sanitization
3. When other users (potentially administrators) access the search functionality or view the manipulated profile data, the injected script executes in their browser
4. The attacker can then steal session cookies, perform actions on behalf of the victim, or redirect users to malicious sites

The vulnerability can be triggered by manipulating the Profile argument with payloads such as script tags or event handlers that execute JavaScript when rendered in the victim's browser.

Detection Methods for CVE-2026-2545

Indicators of Compromise

• Unusual or malformed requests to /otrs/index.pl?Action=AgentTicketSearch containing script tags or JavaScript event handlers
• Presence of encoded JavaScript payloads (e.g., %3Cscript%3E) in the Profile parameter within web server logs
• User reports of unexpected pop-ups, redirects, or unusual behavior when using the ticket search functionality
• Session anomalies indicating potential session hijacking following XSS exploitation

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect and block requests containing XSS payloads in the Profile parameter
• Monitor web server access logs for suspicious patterns in requests to AgentTicketSearch endpoints
• Deploy Content Security Policy (CSP) headers to detect and report inline script execution attempts
• Utilize browser-based XSS auditing tools and security scanners to identify vulnerable endpoints

Monitoring Recommendations

• Enable detailed logging for all requests to the /otrs/index.pl endpoint and review for anomalous input patterns
• Configure alerting for requests containing common XSS signatures such as <script>, javascript:, or onerror=
• Implement real-time monitoring of user session activities to detect potential session hijacking post-exploitation
• Regularly audit search profile data stored in the application for signs of injected malicious content

How to Mitigate CVE-2026-2545

Immediate Actions Required

• Restrict access to the AgentTicketSearch functionality to only essential users until a patch is available
• Deploy WAF rules to filter requests containing XSS payloads targeting the Profile parameter
• Implement Content Security Policy (CSP) headers with strict directives to prevent inline script execution
• Review and audit existing search profiles for any stored malicious payloads

Patch Information

As of the last update, the LigeroSmart project has been notified of this vulnerability through an issue report on GitHub but has not yet responded or released an official patch. Organizations should monitor the LigeroSmart GitHub repository for security updates and apply patches immediately upon release. Additional vulnerability details are documented in VulDB #346154.

Workarounds

• Apply input validation at the web server or reverse proxy level to strip or encode potentially malicious characters from the Profile parameter before reaching the application
• Consider implementing a custom output encoding wrapper for the AgentTicketSearch module to sanitize all user-supplied data before rendering
• Temporarily disable the search profile saving feature if not critical to operations
• Deploy network segmentation to limit exposure of the LigeroSmart application to untrusted networks

# Example Apache mod_rewrite rule to block common XSS patterns
RewriteEngine On
RewriteCond %{QUERY_STRING} (\<script|javascript:|onerror=|onload=) [NC]
RewriteRule ^/otrs/index\.pl$ - [F,L]