CVE-2021-32741 Lack of ratelimit on public share link mount endpoint
Attackers can enumerate valid public share tokens due to missing rate limits, potentially exposing shared data.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-32741?
CVE-2021-32741 is a medium-severity vulnerability in Nextcloud Nextcloud Server, published on 12 Jul 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Nextcloud Server is a Nextcloud package that handles data storage. In versions prior to 19.0.13, 20.011, and 21.0.3, there was a lack of ratelimiting on the public share link mount endpoint. This may have allowed an attacker to enumerate potentially valid share tokens. The issue was fixed in versions 19.0.13, 20.0.11, and 21.0.3. There are no known workarounds.
Weakness: CWE-799
Which versions are affected by CVE-2021-32741?
It affects 1 product.
Products include Nextcloud Nextcloud Server.
How do I fix CVE-2021-32741?
Upgrade to a fixed version.
Is CVE-2021-32741 being exploited?
There is no known exploitation of CVE-2021-32741 in the wild and no public exploit code.
Other vulnerabilities in Nextcloud Nextcloud Server
- CVE-2021-32802 Preview generation used third-party library not suited for user-generated content in Nextcloud server
- CVE-2023-26482 Scope of workflow operations is not validated in nextcloud server
- CVE-2018-3775 Auth bypass in Nextcloud Server
- CVE-2023-35172 Nextcloud Server password reset endpoint is not brute force protected
- CVE-2023-32320 Nextcloud Server's brute force protection allows someone to send more requests than intended
Sources
Also known as GHSA-crvj-vmf7-xrvr.