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CVE-2021-41177

HIGH
Published 2021-10-25T21:50:11
Actions:

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CVSS Score

V3.1
8.1
/10
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Base Score Metrics
Exploitability: N/A Impact: N/A

EPSS Score

v2025.03.14
0.002
probability
of exploitation in the wild

There is a 0.2% chance that this vulnerability will be exploited in the wild within the next 30 days.

Updated: 2025-06-25
Exploit Probability
Percentile: 0.400
Higher than 40.0% of all CVEs

Attack Vector Metrics

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED

Impact Metrics

Confidentiality
HIGH
Integrity
NONE
Availability
HIGH

Description

Nextcloud is an open-source, self-hosted productivity platform. Prior to versions 20.0.13, 21.0.5, and 22.2.0, Nextcloud Server did not implement a database backend for rate-limiting purposes. Any component of Nextcloud using rate-limits (as as `AnonRateThrottle` or `UserRateThrottle`) was thus not rate limited on instances not having a memory cache backend configured. In the case of a default installation, this would notably include the rate-limits on the two factor codes. It is recommended that the Nextcloud Server be upgraded to 20.0.13, 21.0.5, or 22.2.0. As a workaround, enable a memory cache backend in `config.php`.

Available Exploits

No exploits available for this CVE.

Related News

No news articles found for this CVE.

Affected Products

nextcloud

security-advisories

Affected Versions:

< 20.0.13 >= 21.0.0, < 21.0.5 < 22.2.0

References

https://github.com/nextcloud/security-advisories/security/advisories/GHSA-fj39-4qx4-m3f2
https://github.com/nextcloud/server/pull/28728
https://hackerone.com/reports/1265709
https://security.gentoo.org/glsa/202208-17
Published: 2021-10-25T21:50:11
Last Modified: 2024-08-04T02:59:31.688Z
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