Vulnerability · Published Sep 7, 2021 · Assigned by GitHub_M

CVE-2021-37629Lack of ratelimit on Richdocuments OCS endpoint in nextcloud

Medium 5.3

In plain English

A medium-severity information exposure in security-advisories from nextcloud. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.4% (higher than 72% of all known vulnerabilities).

Severity (CVSS 3.1)5.3Medium

Exploit odds (30 days)1.4%top 27.8% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
nextcloud	security-advisories	< 3.8.4>= 4.0.0, < 4.2.1

Weakness: CWE-200 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

References

https://github.com/nextcloud/security-advisories/security/advisories/GHSA-gvvr-h36p-8mjx x_refsource_CONFIRM
https://github.com/nextcloud/richdocuments/pull/1663 x_refsource_MISC
https://hackerone.com/reports/1258750 x_refsource_MISC