Attacker Value
Unknown
0
CVE-2021-22915
0
CVE ID
AttackerKB requires a CVE ID in order to pull vulnerability data and references from the CVE list and the National Vulnerability Database. If available, please supply below:
Add References:
CVE-2021-22915
(Last updated February 22, 2025) ▾
MITRE ATT&CK
Log in to add MITRE ATT&CK tag
Add MITRE ATT&CK tactics and techniques that apply to this CVE.
MITRE ATT&CK
Select the MITRE ATT&CK Tactics that apply to this CVE
Collection
Select any Techniques used:
Command and Control
Select any Techniques used:
Credential Access
Select any Techniques used:
Defense Evasion
Select any Techniques used:
Discovery
Select any Techniques used:
Execution
Select any Techniques used:
Exfiltration
Select any Techniques used:
Impact
Select any Techniques used:
Initial Access
Select any Techniques used:
Lateral Movement
Select any Techniques used:
Persistence
Select any Techniques used:
Privilege Escalation
Select any Techniques used:
Topic Tags
Select the tags that apply to this CVE (Assessment added tags are disabled and cannot be removed)
What makes this of high-value to an attacker?
What makes this of low-value to an attacker?
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.
Add Assessment
No one has assessed this topic. Be the first to add your voice to the community.
CVSS V3 Severity and Metrics
Data provided by the National Vulnerability Database (NVD)
Base Score:
9.8 Critical
Impact Score:
5.9
Exploitability Score:
3.9
Attack Vector (AV):
Network
Attack Complexity (AC):
Low
Privileges Required (PR):
None
User Interaction (UI):
None
Scope (S):
Unchanged
Confidentiality (C):
High
Integrity (I):
High
Availability (A):
High
General Information
Offensive Application
Unknown
Utility Class
Unknown
Ports
Unknown
OS
Unknown
Vulnerable Versions
Nextcloud Server Fixed in 19.0.11, 20.0.10, 21.0.2
Prerequisites
Unknown
Discovered By
Unknown
PoC Author
Unknown
Metasploit Module
Unknown
Reporter
Unknown
References
Advisory
Additional Info
Authenticated
Unknown
Exploitable
Unknown
Reliability
Unknown
Stability
Unknown
Available Mitigations
Unknown
Shelf Life
Unknown
Userbase/Installbase
Unknown
Patch Effectiveness
Unknown
Rapid7
Technical Analysis
Report as Emergent Threat Response
Report as Zero-day Exploit
Report as Exploited in the Wild
CVE ID
AttackerKB requires a CVE ID in order to pull vulnerability data and references from the CVE list and the National Vulnerability Database. If available, please supply below:
