CVE-2021-32689
moderate-risk
Published 2021-07-12
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.
Do I need to act?
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0.26% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
8
CVSS 8.1/10
High
NETWORK
/ LOW complexity
Affected Products (1)
Affected Vendors
References (10)
Third Party Advisory
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-xv6f-3...
Release Notes
https://github.com/nextcloud/spreed/releases/tag/v11.2.2
Release Notes
https://github.com/nextcloud/spreed/releases/tag/v11.3.0
Permissions Required
https://hackerone.com/reports/1200700
Third Party Advisory
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-xv6f-3...
Release Notes
https://github.com/nextcloud/spreed/releases/tag/v11.2.2
Release Notes
https://github.com/nextcloud/spreed/releases/tag/v11.3.0
Permissions Required
https://hackerone.com/reports/1200700
34
/ 100
moderate-risk
Severity
28/34 · Critical
Exploitability
1/34 · Minimal
Exposure
5/34 · Minimal