Compliance Impact

The provided information does not specify how the Blind Cross-Site Scripting (XSS) vulnerability in Teampass affects compliance with common standards and regulations such as GDPR or HIPAA.

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Executive Summary

CVE-2026-3106 is a critical Blind Cross-Site Scripting (XSS) vulnerability in Teampass versions prior to 3.1.5.16. It occurs in the password manager's login functionality, specifically in the 'contraseña' parameter of the login form. During failed authentication attempts, the application does not properly sanitize or encode the username field input. This allows arbitrary JavaScript code to be executed automatically in the administrator's browser when viewing failed login entries, resulting in a blind XSS condition.

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Impact Analysis

This vulnerability can lead to arbitrary JavaScript code execution in the administrator's browser without their knowledge. An attacker can exploit this to perform actions such as stealing session tokens, manipulating the administrator's interface, or executing malicious actions with the administrator's privileges. This can compromise the security of the password manager and potentially expose sensitive credentials or administrative controls.

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Detection Guidance

This vulnerability occurs in the 'contraseña' parameter of the login form during failed authentication attempts, where arbitrary JavaScript code can be executed in the administrator's browser when viewing failed login entries.

To detect this vulnerability on your system, you can monitor failed login attempts and inspect the username field input for unsanitized or encoded JavaScript payloads.

Since the vulnerability is triggered when viewing failed login entries, checking logs or database entries for suspicious script tags or JavaScript code in the username field can help identify exploitation attempts.

Specific commands are not provided in the available resources.

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Mitigation Strategies

The vulnerability has been fixed in Teampass version 3.1.5.24.

Immediate mitigation steps include upgrading Teampass to version 3.1.5.24 or later to apply the security fix.

Until the upgrade can be performed, restrict access to the login page and the failed login entries view to trusted administrators only to reduce the risk of exploitation.

Additionally, monitor login attempts for suspicious input and consider implementing web application firewall (WAF) rules to block malicious payloads targeting the 'contraseña' parameter.

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