CVE-2021-32741

Lack of ratelimit on public share link mount endpoint

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.

Category

5.3
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.34%
Third-Party Advisory github.com Third-Party Advisory github.com
Affected: nextcloud security-advisories
Published at:
Updated at:

References

Link Tags
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-crvj-vmf7-xrvr third party advisory
https://github.com/nextcloud/server/pull/26958 third party advisory patch
https://hackerone.com/reports/1192144 permissions required

Frequently Asked Questions

What is the severity of CVE-2021-32741?
CVE-2021-32741 has been scored as a medium severity vulnerability.
How to fix CVE-2021-32741?
To fix CVE-2021-32741, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-32741 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-32741 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-32741?
CVE-2021-32741 affects nextcloud security-advisories.
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