CVE-2026-50771 in Cognitive Search
Summary
by MITRE • 08/17/2026
Cross Site Scripting vulnerability in Squirro Cognitive Search < 3.14.2 allows a remote attacker to execute arbtirary code via the Email Notification, Create Evaluation Sets and HTML Editor functions.
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Analysis
by VulDB Data Team • 08/17/2026
The identified security flaw represents a classic Cross-Site Scripting (XSS) vulnerability within the Squirro Cognitive Search platform prior to version 3.14.2. This type of weakness stems from insufficient validation or sanitization of user-supplied input before it is processed by the application and subsequently rendered in web pages for other users. In this specific instance, the flaw affects critical administrative and collaborative features including Email Notification configurations, the creation of Evaluation Sets, and the HTML Editor function. These components are central to the platform's utility, allowing administrators to configure system alerts, define criteria for search result evaluation, and edit rich text content respectively. The presence of an XSS vector in these areas indicates that user-controlled data is being injected into the Document Object Model without adequate encoding or context-aware filtering, thereby enabling malicious scripts to execute within the browser session of any victim who interacts with the compromised functionality.
From a technical perspective, this vulnerability aligns closely with CWE-79, which describes Improper Neutralization of Input During Web Page Generation commonly known as Cross-site Scripting. The attack vector is typically classified under Remote Code Execution via Client-Side Injection mechanisms found in the MITRE ATT&CK framework, specifically mapping to techniques such as Stored XSS or Reflected XSS depending on whether the malicious payload persists in the database or is delivered directly through a crafted URL. When an attacker exploits this flaw within the Email Notification feature, they may inject script tags into notification templates that are sent to multiple recipients, effectively turning each email recipient into a potential victim who triggers the execution of arbitrary JavaScript code upon opening the message. Similarly, exploitation via the Create Evaluation Sets function allows for persistent storage of malicious payloads if those sets are viewed by other users or administrators during routine review processes. The HTML Editor component presents an even more direct risk as it is designed to handle rich text input; without proper sanitization, this interface becomes a straightforward conduit for injecting executable scripts that can hijack user sessions, steal sensitive data such as authentication cookies or tokens, and perform actions on behalf of the victim within the context of the trusted Squirro domain.
The operational impact of this vulnerability is severe due to its potential for widespread compromise within an organization's search infrastructure. Successful exploitation allows a remote attacker to achieve arbitrary code execution in the context of the vulnerable web application, which can lead to complete system takeover if combined with other vulnerabilities or misconfigurations. More immediately, it facilitates unauthorized access to sensitive information stored within the cognitive search platform, including proprietary data indexed by Squirro and user credentials. Attackers can also deface websites, redirect users to malicious phishing sites, or deploy keyloggers to capture further authentication details. The ability to execute code via email notifications amplifies the blast radius significantly, as it leverages social engineering tactics inherent in email communication to trick unsuspecting administrators into triggering the exploit simply by viewing a notification. This undermines the integrity and confidentiality guarantees provided by the platform and poses a significant risk to organizations relying on Squirro for critical data discovery and analysis tasks.
To mitigate this vulnerability, immediate action is required to upgrade the Squirro Cognitive Search environment to version 3.14.2 or later where these specific input validation flaws have been addressed through enhanced sanitization routines and output encoding mechanisms. In environments where an immediate patch cannot be applied due to operational constraints, temporary mitigations should include implementing strict Content Security Policy headers that restrict script execution sources and disable inline scripts if feasible within the application's architecture. Additionally, deploying a Web Application Firewall with rules tuned to detect common XSS payloads in HTTP requests targeting the affected endpoints can provide a layer of defense against exploitation attempts. It is also crucial for administrators to review existing configurations for any previously injected malicious content that may have persisted due to this flaw and remove it from email templates, evaluation sets, or HTML editor fields. Regular security audits and penetration testing focusing on input validation across all user-facing components are recommended to ensure ongoing resilience against similar injection-based attacks in the future.