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Medium severity · published Sep 7, 2021
CVE-2021-37629
Nextcloud Richdocuments is an open source collaborative office suite
5.3
CVSS
1.4%
EPSS
No
On KEV
Description
Nextcloud Richdocuments is an open source collaborative office suite. In affected versions there is a lack of rate limiting on the Richdocuments OCS endpoint. This may have allowed an attacker to enumerate potentially valid share tokens. It is recommended that the Nextcloud Richdocuments app is upgraded to either 3.8.4 or 4.2.1 to resolve. For users unable to upgrade it is recommended that the Richdocuments application be disabled.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.4% · higher than 72% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
RI
Richdocuments · Nextcloud
before 3.8.4; 4.0.0 before 4.2.1 · source: NVD
Affected product
RI
Richdocuments
Nextcloud
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-37629
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-37629
Third Party Advisory
https://github.com/nextcloud/richdocuments/pull/1663
Third Party Advisory
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-gvvr-h36p-8mjx
Permissions Required
https://hackerone.com/reports/1258750
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