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CVE-2021-32689

8.1 · HIGH

Nextcloud Talk is a fully on-premises audio/video and chat communication service.

Published Jul 12, 2021CWE-200EPSS 1.00%

Overview

CVE-2021-32689 is a high-severity vulnerability. It was published on July 12, 2021 and has a CVSS 3.1 base score of 8.1 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.1, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

Nextcloud Talk is a fully on-premises audio/video and chat communication service. In versions prior to 11.2.2, if a user was able to reuse an earlier used username, they could get access to any chat message sent to the previous user with this username. The issue was patched in versions 11.2.2 and 11.3.0. As a workaround, don't allow users to choose usernames themselves. This is the default behaviour of Nextcloud, but some user providers may allow doing so.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/nextcloud/security-advisories/security/advisories/GHSA-xv6f-344w-895cGitHubgithub.com/nextcloud/spreed/pull/5633GitHubgithub.com/nextcloud/spreed/releases/tag/v11.2.2GitHubgithub.com/nextcloud/spreed/releases/tag/v11.3.0Refhackerone.com/reports/1200700GitHubgithub.com/nextcloud/security-advisories/security/advisories/GHSA-xv6f-344w-895cGitHubgithub.com/nextcloud/spreed/pull/5633GitHubgithub.com/nextcloud/spreed/releases/tag/v11.2.2GitHubgithub.com/nextcloud/spreed/releases/tag/v11.3.0Refhackerone.com/reports/1200700

How CyberStrike helps

Frequently asked questions

What is CVE-2021-32689?

CVE-2021-32689 is a high-severity vulnerability. It was published on July 12, 2021 and has a CVSS 3.1 base score of 8.1 (HIGH).

How severe is CVE-2021-32689?

This vulnerability has a CVSS 3.1 base score of 8.1, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2021-32689?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2021-32689?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-32689 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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