Executive Summary

CVE-2026-48220 is a reflected cross-site scripting (XSS) vulnerability found in Open ISES Tickets versions before 3.44.2, specifically in the ics205.php file.

The vulnerability occurs because the frm_add_str POST parameter is not properly sanitized, allowing authenticated attackers to inject arbitrary JavaScript code.

When a victim's browser renders the response containing this unsanitized input, the malicious JavaScript payload executes, potentially compromising the user's session or data.

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Impact Analysis

This vulnerability can allow attackers to execute malicious JavaScript in the context of a victim's browser session.

• Steal sensitive information such as session cookies or authentication tokens.
• Perform actions on behalf of the victim user within the application.
• Potentially redirect users to malicious sites or display fraudulent content.

Overall, it can lead to compromised user accounts and unauthorized access to sensitive data.

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Detection Guidance

This vulnerability can be detected by testing the ics205.php endpoint of Open ISES Tickets versions below 3.44.2 for reflected cross-site scripting (XSS) via the frm_add_str POST parameter.

A practical approach is to send a crafted POST request to the ics205.php file with a JavaScript payload in the frm_add_str parameter and observe if the payload is reflected unsanitized in the response.

Example command using curl to test for the vulnerability:

• curl -X POST -d "frm_add_str=<script>alert('XSS')</script>" https://target-site/ics205.php -i

If the response contains the injected script tag without proper encoding or sanitization, the system is vulnerable.

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Mitigation Strategies

The immediate step to mitigate this vulnerability is to upgrade Open ISES Tickets to version 3.44.2 or later, where the reflected XSS issue in ics205.php has been patched.

Until the upgrade can be applied, restrict access to the affected endpoint to trusted users only, and ensure that users are aware of the risk of executing untrusted scripts.

Additionally, consider implementing web application firewall (WAF) rules to detect and block malicious payloads targeting the frm_add_str parameter.

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Compliance Impact

The provided information does not specify how this reflected cross-site scripting (XSS) vulnerability in Open ISES Tickets affects compliance with common standards and regulations such as GDPR or HIPAA.

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