High severity · published Mar 30, 2023
CVE-2023-28643
Nextcloud server is an open source home cloud implementation
8.8
CVSS
0.8%
EPSS
No
On KEV
Description
Nextcloud server is an open source home cloud implementation. In affected versions when a recipient receives 2 shares with the same name, while a memory cache is configured, the second share will replace the first one instead of being renamed to `{name} (2)`. It is recommended that the Nextcloud Server is upgraded to 25.0.3 or 24.0.9. Users unable to upgrade should avoid sharing 2 folders with the same name to the same user.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.8% · higher than 56% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
NS
Nextcloud Server · Nextcloud
24.0.0 before 24.0.9; 24.0.0 before 24.0.9; 25.0.0 before 25.0.3; 25.0.0 before 25.0.3 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-28643
CVE.org
https://www.cve.org/CVERecord?id=CVE-2023-28643
Vendor Advisory
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-hhq4-4pr8-wm27
Exploit
https://github.com/nextcloud/server/issues/34015
Issue Tracking
https://github.com/nextcloud/server/pull/36047
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