Vulnerability 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 Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Nextcloud | Nextcloud Server | < 19.0.11 |
| Fedoraproject | Fedora | 33 |
Related Weaknesses (CWE)
References
- https://hackerone.com/reports/1154003Permissions RequiredThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://nextcloud.com/security/advisory/?id=NC-SA-2021-009Broken Link
- https://hackerone.com/reports/1154003Permissions RequiredThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://nextcloud.com/security/advisory/?id=NC-SA-2021-009Broken Link
FAQ
What is CVE-2021-22915?
CVE-2021-22915 is a vulnerability with a CVSS score of 9.8 (CRITICAL). 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 atta...
How severe is CVE-2021-22915?
CVE-2021-22915 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2021-22915?
Check the references section above for vendor advisories and patch information. Affected products include: Nextcloud Nextcloud Server, Fedoraproject Fedora.