CVE-2021-37628: File Drop can be bypassed using Richdocuments app in nextcloud
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.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
Nextcloud Richdocumentsto a version that resolves this vulnerability.Fixed in 3.8.4 - Upgrade
Upgrade
Nextcloud Richdocumentsto a version that resolves this vulnerability.Fixed in 4.2.1 - Configuration
If upgrading is not possible, disable the Richdocuments application to prevent bypass of File Drop ("Upload Only" public link shares in Nextcloud) via the Richdocuments app.
Nextcloud Richdocuments Richdocuments application = disabled
Event History
Frequently Asked Questions
What is CVE-2021-37628?
CVE-2021-37628 is a vulnerability in Nextcloud Richdocuments, an open source collaborative office suite, that allows bypassing of the File Drop feature, potentially enabling an attacker to read arbitrary files in a public link share.
How does the vulnerability in Nextcloud Richdocuments work?
The vulnerability in Nextcloud Richdocuments allows an attacker to bypass the File Drop feature and read arbitrary files in a public link share.
What is the severity of CVE-2021-37628?
The severity of CVE-2021-37628 is classified as high, with a severity value of 7.5.
Which versions of Nextcloud Richdocuments are affected by CVE-2021-37628?
Nextcloud Richdocuments versions up to and excluding 3.8.4, as well as versions between 4.0.0 and excluding 4.2.1, are affected by CVE-2021-37628.
How can the vulnerability in Nextcloud Richdocuments be fixed?
To fix the vulnerability in Nextcloud Richdocuments, it is recommended to update to a version beyond 4.2.1 or apply the necessary patches provided by Nextcloud.