CVE-2025-34120

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.

Reserved 2025-04-15 | Published 2025-07-16 | Updated 2025-07-16 | Assigner VulnCheck

Problem types

CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

CWE-306 Missing Authentication for Critical Function

Product status

Default status
unaffected

2.0+
affected

Credits

Pichaya Morimoto finder

References

web.archive.org/.../136-limesurvey-security-advisory-10-2015 vendor-advisory patch

sec-consult.com/...-critical-vulnerabilities-in-lime-survey/ third-party-advisory technical-description

raw.githubusercontent.com/...ttp/limesurvey_file_download.rb exploit

packetstorm.news/files/id/180855 exploit

www.vulncheck.com/...unauthenticated-arbitrary-file-download third-party-advisory

cve.org (CVE-2025-34120)

nvd.nist.gov (CVE-2025-34120)

Download JSON