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CVE-2021-39224

3.5 · LOW

Nextcloud is an open-source, self-hosted productivity platform.

Published Oct 25, 2021CWE-200EPSS 0.88%

Overview

CVE-2021-39224 is a low-severity vulnerability. It was published on October 25, 2021 and has a CVSS 3.1 base score of 3.5 (LOW).

This vulnerability has a CVSS 3.1 base score of 3.5, rated LOW. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/nextcloud/officeonline/pull/204GitHubgithub.com/nextcloud/security-advisories/security/advisories/GHSA-56wm-r6jm-3v9hGitHubgithub.com/nextcloud/officeonline/pull/204GitHubgithub.com/nextcloud/security-advisories/security/advisories/GHSA-56wm-r6jm-3v9h

How CyberStrike helps

Frequently asked questions

What is CVE-2021-39224?

CVE-2021-39224 is a low-severity vulnerability. It was published on October 25, 2021 and has a CVSS 3.1 base score of 3.5 (LOW).

How severe is CVE-2021-39224?

This vulnerability has a CVSS 3.1 base score of 3.5, rated LOW. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2021-39224?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2021-39224?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-39224 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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