CVE-2020-8227: nextcloud desktop Path Traversal

Vulnerability summary

CVE-2020-8227 is a high (CVSS 7.1) Path Traversal vulnerability in nextcloud desktop. EPSS estimates a 25.77% chance of exploitation in the next 30 days, higher than 97.9% of scored vulnerabilities. 2 public exploits are recorded.

Timeline

1. 21-08-2020
   PublishedVulnerability first disclosed.
2. 04-08-2024
   Last modifiedVulnerability information updated.

Description

Missing sanitization of a server response in Nextcloud Desktop Client 2.6.4 for Linux allowed a malicious Nextcloud Server to store files outside of the dedicated sync directory.

• CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.