CVE-2025-34120

Summary

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.

Affected Software

Weaknesses

• CWE-22: CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
• CWE-306: CWE-306 Missing Authentication for Critical Function

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: poc
  • Automatable: yes
  • Technical Impact: partial

References

• https://web.archive.org/web/20210123073627/https://www.limesurvey.org/blog/22-security/136-limesurvey-security-advisory-10-2015
• https://sec-consult.com/vulnerability-lab/advisory/multiple-critical-vulnerabilities-in-lime-survey/
• https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/auxiliary/admin/http/limesurvey_file_download.rb
• https://packetstorm.news/files/id/180855
• https://www.vulncheck.com/advisories/limesurvey-unauthenticated-arbitrary-file-download

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