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4.3

Rate limiter not working reliable when Memcached is installed in Nextcloud

CVE-2023-45148 · published 3 years ago
Summary

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 upgrad...

What to do

The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.

Affected software
VendorProductAffected versions
nextcloud nextcloud_server >= 22.0.0, < 22.2.10.16
>= 23.0.0, < 23.0.12.11
>= 24.0.0, < 24.0.12.7
>= 25.0.0, < 25.0.11
>= 26.0.0, < 26.0.6
27.0.0
cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:enterprise:*:*:*
Original advisory text
Rate limiter not working reliable when Memcached is installed in Nextcloud
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.
References
Fix within
Internet-facing 60 days
Internal At next upgrade
  • Not known to be exploited
  • Needs hands-on effort to exploit
  • Gives an attacker partial control
Severity
4.3 Medium
Exploitation
<1% chance of attack within 30 days
Type
CWE-307Improper Restriction of Excessive Authentication Attempts
Timeline
Published16 Oct 2023
Updated3 Nov 2026
First seen29 Sep 2026
Sources
CVE-2023-45148 · NVD
CVE-2023-45148 · OSV
GHSA-xmhp-7vr4-hp63 · GHSA
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