CVE-2021-39223

File path disclosure of shared files in Richdocuments application

Description

Nextcloud is an open-source, self-hosted productivity platform. The Nextcloud Richdocuments application prior to versions 3.8.6 and 4.2.3 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 Richdocuments application is upgraded to 3.8.6 or 4.2.3. As a workaround, disable the Richdocuments application in the app settings.

Category

4.8
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.35%
Third-Party Advisory github.com Third-Party Advisory github.com Third-Party Advisory hackerone.com
Affected: nextcloud security-advisories
Published at:
Updated at:

References

Link Tags
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-rjcc-4cgj-6v93 third party advisory
https://github.com/nextcloud/richdocuments/pull/1760 third party advisory patch
https://hackerone.com/reports/1253460 third party advisory permissions required

Frequently Asked Questions

What is the severity of CVE-2021-39223?
CVE-2021-39223 has been scored as a medium severity vulnerability.
How to fix CVE-2021-39223?
To fix CVE-2021-39223, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-39223 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-39223 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-39223?
CVE-2021-39223 affects nextcloud security-advisories.
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