SSRF in “Add to your ownCloud” functionality

Feb 28, 2020

  • Platform: ownCloud Server
  • Versions: 10.3, 10.3.1
  • Date: 2/28/2020
  • Risk: Low
  • CVSS v3 Base Score: 1.3
  • CVSS v3 Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:N/I:N/A:N
  • CWE ID: 20
  • CWE Name: Improper Input Validation


It is possible to force the ownCloud server to execute GET requests against a crafted URL on the internal or external network (Server Side Request Forgery) after receiving a public link-share URL. The criticality of this issue is lowered because the attacker can not see the result of the forged request thus there is no possibility to exfiltrate any data from an internal resource.


  • owncloud/core < v10.3.2

Action taken

Improve validation of the federated url input in the public-link-share page.