CVE-2021-32655

Name: CVE-2021-32655
Creator: NVD / NIST
Published: 2021-06-01T21:15:07.727+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

LOWCVSS 3.5/10EPSS 1.03%

Last modified Jun 17, 2026

CVE-2021-32655 is a low-severity vulnerability rated 3.5/10 on the CVSS scale. 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. EPSS estimates a 1.03% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

3.5/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N

EPSS Probability

1.03%

59.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-241

Affected Software

Vendor	Product	Versions
Nextcloud	Nextcloud Server	< 19.0.11
Nextcloud	Nextcloud Server	>= 20.0.0, < 20.0.10
Nextcloud	Nextcloud Server	>= 21.0.0, < 21.0.2

References

https://github.com/nextcloud/security-advisories/security/advisories/GHSA-grph-cm44-p3jvThird Party Advisory
https://hackerone.com/reports/1167929Permissions Required, Third Party Advisory
https://security.gentoo.org/glsa/202208-17Third Party Advisory
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-grph-cm44-p3jvThird Party Advisory
https://hackerone.com/reports/1167929Permissions Required, Third Party Advisory
https://security.gentoo.org/glsa/202208-17Third Party Advisory

Timeline

Published: Jun 1, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-32655?

How severe is CVE-2021-32655?

CVE-2021-32655 has a CVSS score of 3.5/10 (LOW severity). The EPSS model estimates a 1.03% probability of exploitation in the next 30 days.

How do I fix CVE-2021-32655?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-32655?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST