CVE-2021-22906 Missing authorization in Nextcloud End-to-End Encryption
Authenticated users can lock other users' files, causing a denial of service in Nextcloud End-to-End Encryption.
- 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-2021-22906?
CVE-2021-22906 is a medium-severity missing authorization vulnerability in Nextcloud End-to-End Encryption, published on 11 Jun 2021. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Nextcloud End-to-End Encryption before 1.5.3, 1.6.3 and 1.7.1 suffers from a denial of service vulnerability due to permitting any authenticated users to lock files of other users.
Which versions are affected by CVE-2021-22906?
It affects 1 product.
Products include Nextcloud End-to-End Encryption.
How do I fix CVE-2021-22906?
No fix has been published for CVE-2021-22906 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-2021-22906 being exploited?
There is no known exploitation of CVE-2021-22906 in the wild and no public exploit code.
Other vulnerabilities in Nextcloud End-to-End Encryption
Sources
Also known as GHSA-3829-45wm-ww36.