Information disclosure in Nextcloud Security-Advisories
CVE-2021-32689
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.
Vulnerability class: Information Disclosure
EPSS: 0.010 (60.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N.
Affected products
- Nextcloud Security-advisories — versions < 11.2.2
- Nextcloud Talk
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Third Party Advisory)
- security-advisories@github.com (Patch, Third Party Advisory, x_refsource_MISC)
- security-advisories@github.com (Permissions Required, x_refsource_MISC)
- security-advisories@github.com (Third Party Advisory, x_refsource_MISC, Release Notes)
- security-advisories@github.com (Third Party Advisory, x_refsource_MISC, Release Notes)
Frequently asked questions
- What is CVE-2021-32689?
- CVE-2021-32689 is a high-severity vulnerability in Nextcloud Security-Advisories, classified under Information Disclosure. CVSS score: 8.1/10. Published 2021-07-12.
- How severe is CVE-2021-32689?
- High severity. CVSS v3 base score is 8.1 out of 10.