Executive Summary

[{'type': 'paragraph', 'content': 'CVE-2026-2547 is a reflected Cross-Site Scripting (XSS) vulnerability found in LigeroSmart versions up to 6.1.26, specifically in the AgentDashboard function within the file /otrs/index.pl.'}, {'type': 'paragraph', 'content': "The vulnerability occurs because the 'Subaction' parameter is not properly validated or encoded before being included in the web page output. This allows an attacker to inject arbitrary JavaScript code that is reflected back to the user and executed in their browser."}, {'type': 'paragraph', 'content': "Exploitation is possible remotely and requires the victim to interact with the maliciously crafted input. A proof-of-concept exploit demonstrates how an attacker can send a POST request with malicious script tags in the 'Subaction' parameter to trigger the XSS."}] [1, 2, 3]

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Impact Analysis

[{'type': 'paragraph', 'content': "This vulnerability allows an attacker to execute arbitrary JavaScript code in the context of a victim's browser session when they interact with the vulnerable LigeroSmart AgentDashboard."}, {'type': 'list_item', 'content': "Potential impacts include session hijacking, where the attacker can steal the victim's session cookies."}, {'type': 'list_item', 'content': 'Privilege escalation or unauthorized actions within the LigeroSmart OTRS web interface.'}, {'type': 'list_item', 'content': 'Execution of malicious scripts that could lead to further attacks such as phishing or malware delivery.'}, {'type': 'paragraph', 'content': 'Because the exploit is publicly available and the vendor has not responded with a fix, the risk of exploitation is increased.'}] [1, 2, 3]

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Compliance Impact

I don't know

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Detection Guidance

[{'type': 'paragraph', 'content': 'This vulnerability can be detected by testing the AgentDashboard functionality of LigeroSmart, specifically by sending crafted HTTP POST requests to the endpoint /otrs/index.pl with the Subaction parameter containing malicious script tags.'}, {'type': 'paragraph', 'content': 'A proof-of-concept involves sending a POST request with the Subaction parameter set to a value like: Element</script><script>alert(7777)</script> or Element</script><script>alert(7776)</script>.'}, {'type': 'paragraph', 'content': 'Example command using curl to test for the vulnerability:'}, {'type': 'list_item', 'content': "curl -X POST 'http://<target>/otrs/index.pl' -H 'Content-Type: application/x-www-form-urlencoded; charset=UTF-8' -H 'X-Requested-With: XMLHttpRequest' --data-urlencode 'Subaction=Element</script><script>alert(7777)</script>'"}, {'type': 'paragraph', 'content': 'If the response contains the injected script and it executes in the browser, the vulnerability is present.'}] [1, 2]

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Mitigation Strategies

Currently, no patches or official mitigations have been provided by the LigeroSmart project as they have not responded to the issue report.

Immediate mitigation steps include:

• Avoid using the vulnerable versions of LigeroSmart (up to 6.1.26) and consider upgrading to a version that addresses the issue once available.
• Restrict access to the AgentDashboard functionality to trusted users only, minimizing exposure.
• Implement web application firewall (WAF) rules to detect and block malicious input targeting the Subaction parameter.
• Consider replacing the affected product with an alternative solution until a fix is released.

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