CVE-2021-22915 — Improper Restriction of Excessive Authentication Attempts in Server

CWE-307 — Improper Restriction of Excessive Authentication Attempts2 documents2 sources
Severity
9.8CRITICALNVD
EPSS
0.5%
top 34.37%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
2
Nextcloud ServerFedoraproject Fedora
Timeline
PublishedJun 11

Description

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 as the Nextcloud brute-force protection.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HExploitability: 3.9 | Impact: 5.9

Affected Packages2 packages

▶NVDnextcloud/nextcloud_server20.0.0 — 20.0.10+2
▶CVEListV5nextcloud/nextcloud_serverFixed in 19.0.11, 20.0.10, 21.0.2

Also affects: Fedora 33, 34

🔴Vulnerability Details

1
CVEList
CVE-2021-22915: Nextcloud server before 19↗2021-06-11
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CVE-2021-22915 — Nextcloud Server vulnerability | cvebase