Cross Site Scripting in Squirro Cognitive Search

Executive Summary

CVE-2026-50771 is a Cross Site Scripting (XSS) vulnerability in Squirro Cognitive Search versions before 3.14.2. It allows a remote attacker to inject and execute arbitrary code through functions like Email Notification, Create Evaluation Sets, and HTML Editor. The issue is a stored XSS where user input is saved and later displayed without proper sanitization, enabling malicious JavaScript injection.

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Detection Guidance

To detect this XSS vulnerability in Squirro Cognitive Search versions prior to 3.14.2, inspect the Email Notification, Create Evaluation Sets, and HTML Editor functions for unsanitized user input. Test by injecting payloads like "><img src=x onerror=alert(1)> into these fields and check if the script executes.

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Impact Analysis

An attacker could exploit this to run malicious scripts in a victim's browser when they access affected functions. This may lead to session hijacking, data theft, or unauthorized actions on behalf of the user. The impact depends on user privileges and the sensitivity of data processed by Squirro.

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Compliance Impact

This XSS vulnerability could violate GDPR by exposing personal data through unauthorized script execution. For HIPAA, it may risk protected health information if exploited in healthcare environments. Compliance depends on data sensitivity and whether the vulnerability leads to breaches of confidentiality or integrity.

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Mitigation Strategies

Upgrade Squirro Cognitive Search to version 3.14.2 or later to patch the vulnerability. If immediate upgrading is not possible, implement input validation and output encoding to sanitize user inputs in the affected functions.

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