Vulnerability Details : CVE-2021-22896
Nextcloud Mail before 1.9.5 suffers from improper access control due to a missing permission check allowing other authenticated users to create mail aliases for other users.
Products affected by CVE-2021-22896
- cpe:2.3:a:nextcloud:nextcloud:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-22896
0.09%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 38 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-22896
| 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:P/A:N |
8.0
|
2.9
|
NIST | |
|
4.3
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N |
2.8
|
1.4
|
NIST |
CWE ids for CVE-2021-22896
-
The product does not perform an authorization check when an actor attempts to access a resource or perform an action.Assigned by:
- nvd@nist.gov (Primary)
- support@hackerone.com (Secondary)
References for CVE-2021-22896
-
https://hackerone.com/reports/1129996
#1129996 Create alias does not validate account idThird Party Advisory
-
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-jmgp-77jq-fjp3
Alias creation did not validate account ID · Advisory · nextcloud/security-advisories · GitHubThird Party Advisory
-
https://github.com/nextcloud/mail/pull/4864
Cleanup aliases logic by kesselb · Pull Request #4864 · nextcloud/mail · GitHubPatch;Third Party Advisory
-
https://github.com/nextcloud/mail/releases/tag/v1.9.5
Release v1.9.5 · nextcloud/mail · GitHubRelease Notes;Third Party Advisory
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