CVE-2021-32655

Files Drop public link can be added as federated share

Description

Nextcloud Server is a Nextcloud package that handles data storage. In versions prior to 19.0.11, 20.0.10, and 21.0.2, an attacker is able to convert a Files Drop link to a federated share. This causes an issue on the UI side of the sharing user. When the sharing user opens the sharing panel and tries to remove the "Create" privileges of this unexpected share, Nextcloud server would silently grant the share read privileges. The vulnerability is patched in versions 19.0.11, 20.0.10 and 21.0.2. No workarounds are known to exist.

Category

3.5
CVSS
Severity: Low
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.31%
Vendor Advisory gentoo.org
Affected: nextcloud security-advisories
Published at:
Updated at:

References

Link Tags
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-grph-cm44-p3jv third party advisory
https://hackerone.com/reports/1167929 third party advisory permissions required
https://security.gentoo.org/glsa/202208-17 third party advisory vendor advisory

Frequently Asked Questions

What is the severity of CVE-2021-32655?
CVE-2021-32655 has been scored as a low severity vulnerability.
How to fix CVE-2021-32655?
To fix CVE-2021-32655, 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-2021-32655 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-32655 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-2021-32655?
CVE-2021-32655 affects nextcloud security-advisories.
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