Description
An unauthenticated file download vulnerability exists in LimeSurvey versions from 2.0+ up to and including 2.06+ Build 151014. The application fails to validate serialized input to the admin backup endpoint (`index.php/admin/update/sa/backup`), allowing attackers to specify arbitrary file paths using a crafted `datasupdateinfo` payload. The files are packaged in a ZIP archive and made available for download without authentication. This vulnerability can be exploited to read arbitrary files on the host system, including sensitive OS and configuration files.
Question to Ask Vendors:
- Can you confirm whether your systems are affected by CVE-2025-34120, and if so, what steps are you currently taking to mitigate this vulnerability?
- What is your estimated timeline for fully resolving CVE-2025-34120 in your products or services, and how will you communicate updates on this issue to us as your customer?
Recommended Actions:
- Check out the advisory links provided below.
References:
- http://webappsec.pbworks.com/Path-Traversal
- https://capec.mitre.org/data/definitions/126.html
- https://capec.mitre.org/data/definitions/64.html
- https://capec.mitre.org/data/definitions/76.html
- https://capec.mitre.org/data/definitions/78.html
- https://capec.mitre.org/data/definitions/79.html
- https://nvd.nist.gov/vuln/detail/CVE-2025-34120