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Vulnerability record · CVE-2023-45148 · published 16 October 2023

CVE-2023-45148: Nextcloud server improper restriction of authentication attempts vulnerability

Nextcloud · Nextcloud Server

Nextcloud is an open source home cloud server. When Memcached is used as `memcache.distributed` the rate limiting in Nextcloud Server could be reset unexpectedly resetting the rate count earlier than intended. Users are advised to upgrade to versions 25.0.11, 26.0.6 or 27.1.0. Users unable to upgrade should change their config setting `memcache.distributed` to `\OC\Memcache\Redis` and install Redis instead of Memcached.

4.3 CVSS 3.1 Medium EPSS 0.70% · top 48.8% CWE-307 · Improper restriction of authentication attempts
4.3CVSS 3.1 base score
0.70%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References
17 Jun 2026Last modified by NVD

Description

Nextcloud is an open source home cloud server. When Memcached is used as `memcache.distributed` the rate limiting in Nextcloud Server could be reset unexpectedly resetting the rate count earlier than intended. Users are advised to upgrade to versions 25.0.11, 26.0.6 or 27.1.0. Users unable to upgrade should change their config setting `memcache.distributed` to `\OC\Memcache\Redis` and install Redis instead of Memcached.

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

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-xmhp-7vr4-hp63 Vendor Advisory
https://github.com/nextcloud/server/pull/40293 Issue TrackingPatch
https://hackerone.com/reports/2110945 Permissions Required
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-xmhp-7vr4-hp63 Vendor Advisory
https://github.com/nextcloud/server/pull/40293 Issue TrackingPatch
https://hackerone.com/reports/2110945 Permissions Required

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Related vulnerabilities

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

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Source: NIST National Vulnerability Database (record CVE-2023-45148), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.