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CVE PROGRAM SOURCE RECORD8.3 High

CVE-2025-27791

Collabora Online Vulnerable to Arbitrary File Write

Description

Collabora Online is a collaborative online office suite based on LibreOffice technology. In versions prior to 24.04.12.4, 23.05.19, and 22.05.25, there is a path traversal flaw in handling the CheckFileInfo BaseFileName field returned from WOPI servers. This allows for a file to be written anywhere the uid running Collabora Online can write, if such a response was supplied by a malicious WOPI server. By combining this flaw with a Time of Check, Time of Use DNS lookup issue with a WOPI server address under attacker control, it is possible to present such a response to be processed by a Collabora Online instance. This issue has been patched in versions 24.04.13.1, 23.05.19, and 22.05.25.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

CollaboraOnline online

  • >= 24.04.1.1, < 24.04.13.1affected
  • >= 23.05.0, < 23.05.19affected
  • < 22.05.25affected

References