What’s Vulnerable › Vulnerabilities

CVE-2023-32319: Basic auth header on WebDAV requests is not brute-force protected in Nextcloud

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-05-26 · updated 2026-06-17
• Weakness: CWE-307

Description

Nextcloud server is an open source personal cloud implementation. Missing brute-force protection on the WebDAV endpoints via the basic auth header allowed to brute-force user credentials when the provided user name was not an email address. Users from version 24.0.0 onward are affected. This issue has been addressed in releases 24.0.11, 25.0.5 and 26.0.0. Users are advised to upgrade. There are no known workarounds for this vulnerability.

Affected products

• Nextcloud Server: from 24.0.0 before 24.0.11; from 25.0.0 before 25.0.5 — fixed in 24.0.11, 25.0.5

How to fix

Upgrade to a fixed version: Nextcloud Server 24.0.11, 25.0.5. Check the vendor advisory for mitigations.

References

• https://github.com/nextcloud/security-advisories/security/advisories/GHSA-mr7q-xf62-fw54
• https://github.com/nextcloud/server/pull/37227
• https://github.com/nextcloud/security-advisories/security/advisories/GHSA-mr7q-xf62-fw54
• https://github.com/nextcloud/server/pull/37227

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