CVE-2023-45148

Rate limiter not working reliable when Memcached is installed in Nextcloud

MEDIUM

4.3

CVSS Score

Published: October 16, 2023 at 06:51 PM UTC

Updated: June 17, 2026 at 06:28 AM UTC

1 product affected across 1 vendorNextcloud/server

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Severity

MEDIUM4.3

Exploit prediction

EPSS 0.9%

SSVC

No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Nextcloud/server · Nextcloudnextcloud-app

95%

22.0.0 ≤ v < 22.2.10.1623.0.0 ≤ v < 23.0.12.1124.0.0 ≤ v < 24.0.12.725.0.0 ≤ v < 25.0.1126.0.0 ≤ v < 26.0.627.0.0

Affected range stops below 22.2.10.16, so it looks safe — our inference, not a vendor statement

Affected range stops below 23.0.12.11, so it looks safe — our inference, not a vendor statement

Affected range stops below 24.0.12.7, so it looks safe — our inference, not a vendor statement

Affected range stops below 25.0.11, so it looks safe — our inference, not a vendor statement

Affected range stops below 26.0.6, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (3)

x_refsource_CONFIRMVendor Advisory

Source: [email protected]

https://github.com/nextcloud/security-advisories/security/advisories/GHSA-xmhp-7vr4-hp63

x_refsource_MISCIssue TrackingPatch

Source: [email protected]

https://github.com/nextcloud/server/pull/40293

x_refsource_MISCPermissions Required

Source: [email protected]

https://hackerone.com/reports/2110945

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

4.3MEDIUMGitHub_M

Attack Vector: NETWORK
Complexity: LOW
Privileges: LOW
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: NONE
Integrity: NONE
Availability: LOW

Vector?

Quick Info

StatusMODIFIED

CWE

CWE-307

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