← Vulnerability feed

Vulnerability record · CVE-2023-48306 · published 21 November 2023

CVE-2023-48306: Nextcloud server server-side request forgery (ssrf) vulnerability

Nextcloud · Nextcloud Server

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.

9.8 CVSS 3.1 Critical EPSS 0.80% · top 45.3% CWE-918 · Server-side request forgery (SSRF)
9.8CVSS 3.1 base score
0.80%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References, 2 tagged exploit
17 Jun 2026Last modified by NVD

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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-8f69-f9jg-4x3v Vendor Advisory
https://github.com/nextcloud/server/pull/40234 ExploitIssue TrackingPatch
https://hackerone.com/reports/2115212 Permissions Required
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-8f69-f9jg-4x3v Vendor Advisory
https://github.com/nextcloud/server/pull/40234 ExploitIssue TrackingPatch
https://hackerone.com/reports/2115212 Permissions Required

Track CVE-2023-48306 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2023-49792Nextcloud server improper restriction of authentication attempts vulnerabilityNextcloud Server provides data storage for Nextcloud, an open source cloud platform. In Nextcloud Server prior to versions 26.0.9 and 27.1.4; as well…EPSS 1.0%9.8CVE-2021-32802Nextcloud server inclusion from untrusted sphere vulnerabilityNextcloud server is an open source, self hosted personal cloud. Nextcloud supports rendering image previews for user provided file content. For some …EPSS 2.6%9.8CVE-2021-32726Nextcloud server improper authentication vulnerabilityNextcloud Server is a Nextcloud package that handles data storage. In versions prior to 19.0.13, 20.011, and 21.0.3, webauthn tokens were not deleted…EPSS 1.8%9.8CVE-2021-22915Nextcloud server improper restriction of authentication attempts vulnerabilityNextcloud server before 19.0.11, 20.0.10, 21.0.2 is vulnerable to brute force attacks due to lack of inclusion of IPv6 subnets in rate-limiting consi…EPSS 1.7%9.1CVE-2023-35172Nextcloud server improper restriction of authentication attempts vulnerabilityNextCloud Server and NextCloud Enterprise Server provide file storage for Nextcloud, a self-hosted productivity platform. In NextCloud Server version…EPSS 0.92%9.1CVE-2021-32654Nextcloud server insecure direct object reference vulnerabilityNextcloud Server is a Nextcloud package that handles data storage. In versions prior to 19.0.11, 20.0.10, and 21.0.2, an attacker is able to receive …EPSS 1.8%8.8CVE-2023-45151Nextcloud server cleartext storage of sensitive data vulnerabilityNextcloud server is an open source home cloud platform. Affected versions of Nextcloud stored OAuth2 tokens in plaintext which allows an attacker who…EPSS 0.48%8.8CVE-2023-35928Nextcloud server vulnerabilityNextcloud Server is a space for data storage on Nextcloud, a self-hosted productivity playform. In NextCloud Server versions 25.0.0 until 25.0.7 and …EPSS 0.98%

Source: NIST National Vulnerability Database (record CVE-2023-48306), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.