EUVD-2026-17345
CVSS Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Lifecycle Timeline
4Description
Blind Cross-Site Scripting (XSS) in Teampass, versions prior to 3.1.5.16, within the password manager login functionality in the 'contraseña' parameter of the login form 'redacted/index.php'. During failed authentication attempts, the application does not properly clean or encode the information entered by the user in the username field. As a result, arbitrary JavaScript code is automatically executed in the administrator's browser when viewing failed login entries, resulting in a blind XSS condition.
Analysis
Blind Cross-Site Scripting in Teampass password manager versions prior to 3.1.5.16 allows unauthenticated remote attackers to execute arbitrary JavaScript in administrator browsers via malicious username input during failed login attempts. The vulnerability achieves high confidentiality and integrity impact (CVSS 9.3) because malicious code is stored and automatically executed when administrators review failed authentication logs, enabling potential session hijacking, credential theft, or administrative account compromise. …
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Remediation
Within 24 hours: Inventory all Teampass deployments and confirm current versions. Within 7 days: Upgrade all instances to Teampass 3.1.5.16 or later. …
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External POC / Exploit Code
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