Vulnerability Details : CVE-2023-25821
Potential exploit
Nextcloud is an Open Source private cloud software. Versions 24.0.4 and above, prior to 24.0.7, and 25.0.0 and above, prior to 25.0.1, contain Improper Access Control. Secure view for internal shares can be circumvented if reshare permissions are also given. This issue is patched in versions 24.0.7 and 25.0.1. No workaround is available.
Vulnerability category: BypassGain privilege
Products affected by CVE-2023-25821
- cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:*:*:*:*
- Nextcloud » Nextcloud Server » Enterprise EditionVersions from including (>=) 24.0.4 and before (<) 24.0.7cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:enterprise:*:*:*
- cpe:2.3:a:nextcloud:nextcloud_server:25.0.0:*:*:*:enterprise:*:*:*
- cpe:2.3:a:nextcloud:nextcloud_server:25.0.0:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2023-25821
0.26%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 49 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2023-25821
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
---|---|---|---|---|---|---|
7.5
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
3.9
|
3.6
|
NIST | |
5.7
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N |
2.1
|
3.6
|
GitHub, Inc. |
CWE ids for CVE-2023-25821
-
The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.Assigned by: security-advisories@github.com (Secondary)
References for CVE-2023-25821
-
https://hackerone.com/reports/1724016
HackerOneExploit;Third Party Advisory
-
https://github.com/nextcloud/server/pull/34502
Propagate attributes when resharing by CarlSchwan · Pull Request #34502 · nextcloud/server · GitHubPatch
-
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-7w6h-5qgw-4j94
Download permissions can be changed by resharer · Advisory · nextcloud/security-advisories · GitHubVendor Advisory
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