CVE-2025-47791: nextcloud server SSRF — Fix

Description

Nextcloud Server is a self hosted personal cloud system. In Nextcloud Server prior to 28.0.13, 29.0.10, and 30.0.3 and Nextcloud Enterprise Server prior to 28.0.13, 29.0.10, and 30.0.3, a currently unused endpoint to verify a share recipient was not protected correctly, allowing to proxy requests to another server. The endpoint was removed in Nextcloud Server 28.0.13, 29.0.10, and 30.0.3 and Nextcloud Enterprise Server 28.0.13, 29.0.10, and 30.0.3. No known workarounds are available.

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CVSS v3.1 Score

4.3

MEDIUM

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

Weakness Type (CWE)

CWE-918 Server-Side Request Forgery (SSRF)

Affected Products

Vendor	Product	Versions
nextcloud	nextcloud_server	28.0.0 — 28.0.13
nextcloud	nextcloud_server	28.0.0 — 28.0.13
nextcloud	nextcloud_server	29.0.0 — 29.0.10
nextcloud	nextcloud_server	29.0.0 — 29.0.10
nextcloud	nextcloud_server	30.0.0 — 30.0.3
nextcloud	nextcloud_server	30.0.0 — 30.0.3

References

Advisories & Patches

https://github.com/nextcloud/security-advisories/security/advisories/GHSA-c7vq-m7f8-rx37 https://github.com/nextcloud/server/pull/49558

Frequently Asked Questions

What is CVE-2025-47791? +

Nextcloud Server is a self hosted personal cloud system. In Nextcloud Server prior to 28.0.13, 29.0.10, and 30.0.3 and Nextcloud Enterprise Server prior to 28.0.13, 29.0.10, and 30.0.3, a currently unused endpoint to verify a share recipient was not protected correctly, allowing to proxy requests to another server. The endpoint was removed in Nextcloud Server 28.0.13, 29.0.10, and 30.0.3 and Nextcloud Enterprise Server 28.0.13, 29.0.10, and 30.0.3. No known workarounds are available. It has a CVSS v3.1 base score of 4.3 (MEDIUM).

How severe is CVE-2025-47791? +

CVE-2025-47791 has a CVSS v3.1 score of 4.3 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-47791? +

CVE-2025-47791 affects products from nextcloud, specifically: nextcloud_server. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-47791? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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