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CVE-2021-37628

7.5 · HIGH

Nextcloud Richdocuments is an open source collaborative office suite.

Published Sep 7, 2021CWE-639EPSS 2.09%

Overview

CVE-2021-37628 is a high-severity vulnerability. It was published on September 7, 2021 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

Nextcloud Richdocuments is an open source collaborative office suite. In affected versions the File Drop features ("Upload Only" public link shares in Nextcloud) can be bypassed using the Nextcloud Richdocuments app. An attacker was able to read arbitrary files in such a share. It is recommended that the Nextcloud Richdocuments is upgraded to 3.8.4 or 4.2.1. If upgrading is not possible then it is recommended to disable the Richdocuments application.

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/richdocuments/pull/1664GitHubgithub.com/nextcloud/security-advisories/security/advisories/GHSA-pxhh-954f-8w7wRefhackerone.com/reports/1253403GitHubgithub.com/nextcloud/richdocuments/pull/1664GitHubgithub.com/nextcloud/security-advisories/security/advisories/GHSA-pxhh-954f-8w7wRefhackerone.com/reports/1253403

How CyberStrike helps

Frequently asked questions

What is CVE-2021-37628?

CVE-2021-37628 is a high-severity vulnerability. It was published on September 7, 2021 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2021-37628?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2021-37628?

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-2021-37628?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-37628 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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