High severity · published Feb 25, 2023
CVE-2023-25821
Nextcloud is an Open Source private cloud software
7.5
CVSS
0.9%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.9% · higher than 61% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
NS
Nextcloud Server · Nextcloud
24.0.4 before 24.0.7; 24.0.4 before 24.0.7; 25.0.0; 25.0.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-25821
CVE.org
https://www.cve.org/CVERecord?id=CVE-2023-25821
Vendor Advisory
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-7w6h-5qgw-4j94
Patch
https://github.com/nextcloud/server/pull/34502
Exploit
https://hackerone.com/reports/1724016
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