CVE-2021-32678

Name: CVE-2021-32678
Creator: NVD / NIST
Published: 2021-07-12T13:15:07.923+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.3/10EPSS 1.37%

Last modified Jun 17, 2026

CVE-2021-32678 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. Nextcloud Server is a Nextcloud package that handles data storage. In versions prior to 19.0.13, 20.0.11, and 21.0.3, ratelimits are not applied to OCS API responses. EPSS estimates a 1.37% chance of exploitation in the next 30 days.

Description

Nextcloud Server is a Nextcloud package that handles data storage. In versions prior to 19.0.13, 20.0.11, and 21.0.3, ratelimits are not applied to OCS API responses. This affects any OCS API controller (`OCSController`) using the `@BruteForceProtection` annotation. Risk depends on the installed applications on the Nextcloud Server, but could range from bypassing authentication ratelimits or spamming other Nextcloud users. The vulnerability is patched in versions 19.0.13, 20.0.11, and 21.0.3. No workarounds aside from upgrading are known to exist.

Metrics

CVSS 3.1

5.3/10

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

EPSS Probability

1.37%

68.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Nextcloud	Nextcloud Server	< 19.0.13
Nextcloud	Nextcloud Server	>= 20.0.0, < 20.0.11
Nextcloud	Nextcloud Server	>= 21.0.0, < 21.0.3
Fedoraproject	Fedora	33
Fedoraproject	Fedora	34

References

https://github.com/nextcloud/security-advisories/security/advisories/GHSA-48rx-3gmf-g74jThird Party Advisory
https://github.com/nextcloud/server/pull/27329Patch, Third Party Advisory
https://hackerone.com/reports/1214158Permissions Required
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BVZS26RDME2DYTKET5AECRIZDFUGR2AZ/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/J63NBVPR2AQCAWRNDOZSGRY5II4WS2CZ/
https://security.gentoo.org/glsa/202208-17Third Party Advisory
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-48rx-3gmf-g74jThird Party Advisory
https://github.com/nextcloud/server/pull/27329Patch, Third Party Advisory
https://hackerone.com/reports/1214158Permissions Required
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BVZS26RDME2DYTKET5AECRIZDFUGR2AZ/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/J63NBVPR2AQCAWRNDOZSGRY5II4WS2CZ/
https://security.gentoo.org/glsa/202208-17Third Party Advisory

Timeline

Published: Jul 12, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-32678?

How severe is CVE-2021-32678?

CVE-2021-32678 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 1.37% probability of exploitation in the next 30 days.

How do I fix CVE-2021-32678?

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-2021-32678?

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

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Source: NVD / NIST