CVE-2021-37630 Secret Circle can be joined without approval in Nextcloud Circles
Attackers can join secret circles without approval, leaking private information in Nextcloud Circles applications.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-37630?
CVE-2021-37630 is a medium-severity missing authorization vulnerability in nextcloud security-advisories, published on 7 Sep 2021. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Nextcloud Circles is an open source social network built for the nextcloud ecosystem. In affected versions the Nextcloud Circles application allowed any user to join any "Secret Circle" without approval by the Circle owner leaking private information. It is recommended that Nextcloud Circles is upgraded to 0.19.15, 0.20.11 or 0.21.4. There are no workarounds for this issue.
Weakness: CWE-639
Which versions are affected by CVE-2021-37630?
It affects 1 product.
Products include Nextcloud Circles.
How do I fix CVE-2021-37630?
No fix has been published for CVE-2021-37630 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2021-37630 being exploited?
There is no known exploitation of CVE-2021-37630 in the wild and no public exploit code.
Other vulnerabilities in nextcloud security-advisories
Sources
Also known as GHSA-56j9-3rj4-wvgm.