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CVE-2025-5352 PoC — Environment Variable XSS in Analytics Component in lunary-ai/lunary

Source
https://github.com/sahiloj/CVE-2025-5352
Associated Vulnerability
Title:Environment Variable XSS in Analytics Component in lunary-ai/lunary (CVE-2025-5352)
Description:A critical stored Cross-Site Scripting (XSS) vulnerability exists in the Analytics component of lunary-ai/lunary versions up to 1.9.23, where the NEXT_PUBLIC_CUSTOM_SCRIPT environment variable is directly injected into the DOM using dangerouslySetInnerHTML without any sanitization or validation. This allows arbitrary JavaScript execution in all users' browsers if an attacker can control the environment variable during deployment or through server compromise. The vulnerability can lead to complete account takeover, data exfiltration, malware distribution, and persistent attacks affecting all users until the environment variable is cleaned. The issue is fixed in version 1.9.25.
Description
A stored XSS vulnerability exists in the Analytics component of lunary-ai/lunary where NEXT_PUBLIC_CUSTOM_SCRIPT is injected into the DOM using dangerouslySetInnerHTML without sanitization. An attacker controlling this variable during deployment or via server compromise can run arbitrary JavaScript in all users’ browsers.
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