Critical severity · published Nov 21, 2023
CVE-2023-48306
Nextcloud Server provides data storage for Nextcloud, an open source cloud platform
9.8
CVSS
0.8%
EPSS
No
On KEV
Description
Nextcloud Server provides data storage for Nextcloud, an open source cloud platform. Starting in version 25.0.0 and prior to versions 25.0.11, 26.0.6, and 27.1.0 of Nextcloud Server and starting in version 22.0.0 and prior to versions 22.2.10.16, 23.0.12.11, 24.0.12.7, 25.0.11, 26.0.6, and 27.1.0 of Nextcloud Enterprise Server, the DNS pin middleware was vulnerable to DNS rebinding allowing an attacker to perform SSRF as a final result. Nextcloud Server 25.0.11, 26.0.6, and 27.1.0 and Nextcloud Enterprise Server 22.2.10.16, 23.0.12.11, 24.0.12.7, 25.0.11, 26.0.6, and 27.1.0 contain patches for this issue. No known workarounds are available.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
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
22.0.0 before 22.2.10.16; 23.0.0 before 23.0.12.11; 24.0.0 before 24.0.12.7; 25.0.0 before 25.0.11; 25.0.0 before 25.0.11; 26.0.0 before 26.0.6; +3 more · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-48306
CVE.org
https://www.cve.org/CVERecord?id=CVE-2023-48306
Vendor Advisory
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-8f69-f9jg-4x3v
Exploit
https://github.com/nextcloud/server/pull/40234
Permissions Required
https://hackerone.com/reports/2115212
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