Rate limiter not working reliable when Memcached is installed in Nextcloud

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.

Scores

EPSS (exploitation in 30 days)

0.88% · top 41% of all CVEs (7 Nov 2026)

CISA SSVC

Exploitation: none · Automatable: no · Technical impact: partial

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 4.3.

Weakness

• CWE-307: Improper Restriction of Excessive Authentication Attempts (opens in a new tab)All about CWE-307 and its CVEs

Affected products

• nextcloud · security-advisories

  • affected >= 25.0.0, < 25.0.11
  • affected >= 26.0.0, < 26.0.6
  • affected >= 27.0.0, < 27.1.0

References (3)

• https://github.com/nextcloud/security-advisories/security/advisories/GHSA-xmhp-7vr4-hp63 (opens in a new tab)x_refsource_CONFIRMx_transferred
• https://github.com/nextcloud/server/pull/40293 (opens in a new tab)x_refsource_MISCx_transferred
• https://hackerone.com/reports/2110945 (opens in a new tab)x_refsource_MISCx_transferred

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2023-45148](https://trackcve.app/badge/CVE-2023-45148.svg)](https://trackcve.app/cve/CVE-2023-45148)

Record last updated 16 Sept 2024, 14:50 UTC.