CVE-2025-24366: Insufficient sanitization of user provided rsync command in SFTPGo

Vulnerability summary

CVE-2025-24366 is a high (CVSS 7.5) vulnerability in drakkan sftpgo. EPSS estimates a 0.73% chance of exploitation in the next 30 days, higher than 54.3% of scored vulnerabilities.

Timeline

1. 07-02-2025
   PublishedVulnerability first disclosed.
2. 07-02-2025
   Last modifiedVulnerability information updated.

Description

SFTPGo is an open source, event-driven file transfer solution. SFTPGo supports execution of a defined set of commands via SSH. Besides a set of default commands some optional commands can be activated, one of them being `rsync`. It is disabled in the default configuration and it is limited to the local filesystem, it does not work with cloud/remote storage backends. Due to missing sanitization of the client provided `rsync` command, an authenticated remote user can use some options of the rsync command to read or write files with the permissions of the SFTPGo server process. This issue was fixed in version v2.6.5 by checking the client provided arguments. Users are advised to upgrade. There are no known workarounds for this vulnerability.

• CWE-78Improper Neutralization of Special Elements used in an OS CommandThe product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command before it is sent to a downstream component.