CVE-2021-37628

Name: CVE-2021-37628
Creator: NVD / NIST
Published: 2021-09-07T21:15:08.73+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 2.02%

Last modified Jun 17, 2026

CVE-2021-37628 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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. EPSS estimates a 2.02% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

2.02%

78.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Nextcloud	Richdocuments	< 3.8.4
Nextcloud	Richdocuments	>= 4.0.0, < 4.2.1

References

https://github.com/nextcloud/richdocuments/pull/1664Patch, Third Party Advisory
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-pxhh-954f-8w7wThird Party Advisory
https://hackerone.com/reports/1253403Permissions Required, Third Party Advisory
https://github.com/nextcloud/richdocuments/pull/1664Patch, Third Party Advisory
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-pxhh-954f-8w7wThird Party Advisory
https://hackerone.com/reports/1253403Permissions Required, Third Party Advisory

Timeline

Published: Sep 7, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-37628?

How severe is CVE-2021-37628?

CVE-2021-37628 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 2.02% probability of exploitation in the next 30 days.

How do I fix CVE-2021-37628?

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-2021-37628?

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

Scan your code now

Source: NVD / NIST