Vulnerability in Nextcloud Nextcloud_server
CVE-2021-22915
Nextcloud server before 19.0.11, 20.0.10, 21.0.2 is vulnerable to brute force attacks due to lack of inclusion of IPv6 subnets in rate-limiting considerations. This could potentially result in an attacker bypassing rate-limit controls such…
EPSS: 0.017 (75.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Nextcloud Nextcloud_server
- Fedoraproject Fedora — versions 33, 34
- N/a Nextcloud Server — versions Fixed in 19.0.11, 20.0.10, 21.0.2
Weakness classification (CWE)
References
- support@hackerone.com (Permissions Required, Third Party Advisory, x_refsource_MISC)
- support@hackerone.com (x_refsource_MISC, Broken Link)
- support@hackerone.com (x_refsource_FEDORA, vendor-advisory)
- support@hackerone.com (x_refsource_FEDORA, vendor-advisory)
Frequently asked questions
- What is CVE-2021-22915?
- CVE-2021-22915 is a critical-severity vulnerability in Nextcloud Nextcloud_server, classified under Improper Restriction of Excessive Authentication Attempts. CVSS score: 9.8/10. Published 2021-06-11.
- How severe is CVE-2021-22915?
- Critical severity. CVSS v3 base score is 9.8 out of 10.