CVE-2021-39223

MediumCVSS 5.3/10Last modified Jun 17, 2026

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.

Metrics

CVSS 3.1 5.3/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Weakness enumeration

CWE-200

Affected software

Vendor	Product	Versions
nextcloud	security-advisories	< 3.8.6,; >= 4.0.0, < 4.2.3

References

https://github.com/nextcloud/richdocuments/pull/1760Patch, Third Party Advisory
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-rjcc-4cgj-6v93Third Party Advisory
https://hackerone.com/reports/1253460Permissions Required, Third Party Advisory
https://github.com/nextcloud/richdocuments/pull/1760Patch, Third Party Advisory
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-rjcc-4cgj-6v93Third Party Advisory
https://hackerone.com/reports/1253460Permissions Required, Third Party Advisory

Timeline

Published: Oct 25, 2021
Last modified: Jun 17, 2026
NVD status: Modified

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