CVE-2021-39224
This could result in a full path disclosure on shared files.
Does this matter?
Lower severity and a low EPSS score (0.88%). Track it; it rarely justifies an emergency change on its own.
Description
Nextcloud is an open-source, self-hosted productivity platform. The Nextcloud OfficeOnline application prior to version 1.1.1 returned verbatim exception messages to the user. This could result in a full path disclosure on shared files. (e.g. an attacker could see that the file `shared.txt` is located within `/files/$username/Myfolder/Mysubfolder/shared.txt`). It is recommended that the OfficeOnline application is upgraded to 1.1.1. As a workaround, one may disable the OfficeOnline application in the app settings.
- CVSS 3.1
- 5.3 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- EPSS
- 0.88% probability · 57th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-200
- Affected
- nextcloud/officeonline
- Source
- security-advisories@github.com
References
- https://github.com/nextcloud/officeonline/pull/204Patch, Third Party Advisory
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-56wm-r6jm-3v9hThird Party Advisory
- https://github.com/nextcloud/officeonline/pull/204Patch, Third Party Advisory
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-56wm-r6jm-3v9hThird Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.