CVE-2021-39224

Name: CVE-2021-39224
Creator: NVD / NIST
Published: 2021-10-25T22:15:07.577+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.3/10EPSS 0.85%

Last modified Jun 17, 2026

CVE-2021-39224 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. 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. EPSS estimates a 0.85% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

5.3/10

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

EPSS Probability

0.85%

53.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-200

Affected Software

Vendor	Product	Versions
Nextcloud	Officeonline	< 1.1.1

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

Timeline

Published: Oct 25, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-39224?

How severe is CVE-2021-39224?

CVE-2021-39224 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 0.85% probability of exploitation in the next 30 days.

How do I fix CVE-2021-39224?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-39224?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST