CVE-2021-32689
8.1 · HIGHOverview
CVE-2021-32689 is a high-severity vulnerability affecting nextcloud talk. 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 and patches from nextcloud. Update talk to the latest patched version. 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.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| nextcloud | talk | >= 0, < 11.2.2 | Affected |
References
Frequently Asked Questions
What is CVE-2021-32689?
CVE-2021-32689 is a high-severity vulnerability affecting nextcloud talk. 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 and patches from nextcloud. Update talk to the latest patched version. 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's AI-powered security agents can automatically detect CVE-2021-32689 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
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