CVE-2023-48306

Public Exploit
Nextcloud Server DNS pin middleware can be tricked into DNS rebinding allowing SSRF

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.

Category

5.0
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.50%
Vendor Advisory github.com
Affected: nextcloud security-advisories
Published at:
Updated at:

References

Link Tags
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-8f69-f9jg-4x3v vendor advisory
https://github.com/nextcloud/server/pull/40234 patch issue tracking exploit
https://hackerone.com/reports/2115212 permissions required

Frequently Asked Questions

What is the severity of CVE-2023-48306?
CVE-2023-48306 has been scored as a medium severity vulnerability.
How to fix CVE-2023-48306?
To fix CVE-2023-48306, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2023-48306 being actively exploited in the wild?
It is possible that CVE-2023-48306 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-48306?
CVE-2023-48306 affects nextcloud security-advisories.
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