Impact
Unauthenticated attacker is able to gain access to files which are currently opened by other users in the Collabora Online editor. For successful exploitation the attacker is required to guess the file identifier - the predictability of this file identifier is dependent on external file-storage implementations (this is a potential "IDOR" - Insecure Direct Object Reference - vulnerability)
There is no known workaround except updating the Collabora Online application to one of the patched releases.
Patches
Users should upgrade to Collabora Online 4.2.17-2 or higher, or Collabora Online 6.4.9-6 or higher.
For more information
If you have any questions or comments about this advisory:
Impact
Unauthenticated attacker is able to gain access to files which are currently opened by other users in the Collabora Online editor. For successful exploitation the attacker is required to guess the file identifier - the predictability of this file identifier is dependent on external file-storage implementations (this is a potential "IDOR" - Insecure Direct Object Reference - vulnerability)
There is no known workaround except updating the Collabora Online application to one of the patched releases.
Patches
Users should upgrade to Collabora Online 4.2.17-2 or higher, or Collabora Online 6.4.9-6 or higher.
For more information
If you have any questions or comments about this advisory: