Is CVE-2023-48306 actively exploited?

No active exploitation of CVE-2023-48306 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2023-48306 be exploited remotely?

Yes. CVE-2023-48306 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2023-48306?

CVE-2023-48306 has a CVSS score of 9.8 (CRITICAL).

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CRITICAL

CVE-2023-48306

CWE-918Published: November 21, 2023· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official 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.

NVD Source

Risk Analysis

Nextcloud Server is susceptible to DNS rebinding, which can be exploited to perform Server-Side Request Forgery (SSRF). This critical flaw allows remote attackers to bypass security boundaries and interact with internal services.

No public exploit is known, and it is not in CISA KEV. The vulnerability is remotely exploitable with low attack complexity.

Recommended Action

Apply the provided patches for Nextcloud Server or Nextcloud Enterprise Server to the specified versions.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2023-48306 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.