CVE-2021-22896 Missing authorization in Nextcloud Mail
Authenticated users can create mail aliases for other users due to missing permission checks in Nextcloud Mail.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-22896?
CVE-2021-22896 is a medium-severity missing authorization vulnerability in Nextcloud Mail, published on 11 Jun 2021. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Nextcloud Mail before 1.9.5 suffers from improper access control due to a missing permission check allowing other authenticated users to create mail aliases for other users.
Weakness: CWE-862
Which versions are affected by CVE-2021-22896?
1 open source package ship an affected version, including nextcloud. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
nextcloud Bitnami | All versions | 1.9.5 |
Products include Nextcloud Nextcloud.
How do I fix CVE-2021-22896?
Upgrade nextcloud to 1.9.5 or later.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2021-22896 being exploited?
There is no known exploitation of CVE-2021-22896 in the wild and no public exploit code.
Other vulnerabilities in Nextcloud Mail
- CVE-2019-5454 SQL injection in com.nextcloud.client
- CVE-2021-43863 SQL Injection in FileContentProvider (GHSL-2021-1007)
- CVE-2019-5450 Cross-site scripting in com.nextcloud.client
- CVE-2019-5455 Auth bypass in com.nextcloud.client
- CVE-2021-22905 Information disclosure in Nextcloud Android App (com.nextcloud.client)
Sources
Also known as BIT-nextcloud-2021-22896, GHSA-jmgp-77jq-fjp3.