What is CVE-2023-32319?

CVE-2023-32319 is a high-severity vulnerability in Nextcloud Server, classified under Improper Restriction of Excessive Authentication Attempts. CVSS score: 8.1/10. Published 2023-05-26.

How severe is CVE-2023-32319?

High severity. CVSS v3 base score is 8.1 out of 10.

Vulnerability in Nextcloud Server

CVE-2023-32319

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.

Published 2023-05-26 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N.

EPSS exploit prediction

EPSS: 0.007 (52.1th percentile), scored 2026-10-19.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 52nd percentile — 52.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

Nextcloud Server
Nextcloud Security-Advisories — versions >= 24.0.0, < 24.0.11, >= 25.0.0, < 25.0.5

Weakness classification (CWE)

CWE-307 — Improper Restriction of Excessive Authentication Attempts

References

github.com/nextcloud/security-advisories/security/advisories/GHSA-mr7q-xf62-fw54 (Vendor Advisory)
github.com/nextcloud/server/pull/37227 (Patch)

Frequently asked questions

What is CVE-2023-32319?: CVE-2023-32319 is a high-severity vulnerability in Nextcloud Server, classified under Improper Restriction of Excessive Authentication Attempts. CVSS score: 8.1/10. Published 2023-05-26.
How severe is CVE-2023-32319?: High severity. CVSS v3 base score is 8.1 out of 10.