Vulnerability Details : CVE-2021-22906
Nextcloud End-to-End Encryption before 1.5.3, 1.6.3 and 1.7.1 suffers from a denial of service vulnerability due to permitting any authenticated users to lock files of other users.
Vulnerability category: Denial of service
Products affected by CVE-2021-22906
- cpe:2.3:a:nextcloud:end-to-end_encryption:*:*:*:*:*:*:*:*
- cpe:2.3:a:nextcloud:end-to-end_encryption:*:*:*:*:*:*:*:*
- cpe:2.3:a:nextcloud:end-to-end_encryption:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-22906
0.09%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 37 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-22906
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
4.0
|
MEDIUM | AV:N/AC:L/Au:S/C:N/I:N/A:P |
8.0
|
2.9
|
NIST | |
|
6.5
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
2.8
|
3.6
|
NIST |
CWE ids for CVE-2021-22906
-
The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources.Assigned by: support@hackerone.com (Secondary)
-
The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data.Assigned by: nvd@nist.gov (Primary)
References for CVE-2021-22906
-
https://hackerone.com/reports/1189174
#1189174 End to end encryption folder locking is not properly protectedExploit;Issue Tracking;Third Party Advisory
-
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-3829-45wm-ww36
End to end encryption folder locking is not properly protected · Advisory · nextcloud/security-advisories · GitHubThird Party Advisory
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