What’s Vulnerable › Vulnerabilities

CVE-2023-25162: Nextcloud Server vulnerable to SSRF via filter bypass due to lax checking on IPs

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2023-02-13 · updated 2026-06-17
• Weakness: CWE-918

Description

Nextcloud Server is the file server software for Nextcloud, a self-hosted productivity platform. Nextcloud Server prior to 24.0.8 and 23.0.12 and Nextcloud Enterprise server prior to 24.0.8 and 23.0.12 are vulnerable to server-side request forgery (SSRF). Attackers can leverage enclosed alphanumeric payloads to bypass IP filters and gain SSRF, which would allow an attacker to read crucial metadata if the server is hosted on the AWS platform. Nextcloud Server 24.0.8 and 23.0.2 and Nextcloud Enterprise Server 24.0.8 and 23.0.12 contain a patch for this issue. No known workarounds are available.

Affected products

• Nextcloud Server: before 23.0.12; from 24.0.0 before 24.0.8 — fixed in 23.0.12, 24.0.8

How to fix

Upgrade to a fixed version: Nextcloud Server 23.0.12, 24.0.8. Check the vendor advisory for mitigations.

References

• https://github.com/nextcloud/security-advisories/security/advisories/GHSA-mqrx-grp7-244m
• https://github.com/nextcloud/server/pull/34160
• https://hackerone.com/reports/1702864
• https://github.com/nextcloud/security-advisories/security/advisories/GHSA-mqrx-grp7-244m
• https://github.com/nextcloud/server/pull/34160
• https://hackerone.com/reports/1702864

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