CVE-2021-22895

low-risk
Published 2021-06-11

Nextcloud Desktop Client before 3.3.1 is vulnerable to improper certificate validation due to lack of SSL certificate verification when using the "Register with a Provider" flow.

Do I need to act?

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0.36% 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
5
CVSS 5.9/10 Medium
NETWORK / HIGH complexity

Affected Products (3)

Affected Vendors

Debian Nextcloud

References (10)

Patch https://github.com/nextcloud/desktop/pull/2926
Release Notes https://github.com/nextcloud/desktop/releases/tag/v3.1.3
Third Party Advisory https://github.com/nextcloud/security-advisories/security/advisories/GHSA-qpgp-v...
Exploit https://hackerone.com/reports/903424
Third Party Advisory https://www.debian.org/security/2021/dsa-4974
Patch https://github.com/nextcloud/desktop/pull/2926
Release Notes https://github.com/nextcloud/desktop/releases/tag/v3.1.3
Third Party Advisory https://github.com/nextcloud/security-advisories/security/advisories/GHSA-qpgp-v...
Exploit https://hackerone.com/reports/903424
Third Party Advisory https://www.debian.org/security/2021/dsa-4974
28
/ 100
low-risk
Severity 18/34 · Moderate
Exploitability 1/34 · Minimal
Exposure 9/34 · Low