CVE-2024-37312Public exploit

Account registration via unchecked disabled ID4me routes

Published Jun 14, 2024 · Updated Aug 2, 2024

Improper access control in Nextcloud OpenID Connect user backend 1.3.6 and earlier allows attackers to register accounts through ID4me. Id4meController invokes its showLogin, login, and code routes without checking whether the id4me_enabled setting is disabled. An unauthenticated requester who can reach the Nextcloud server can use the disabled feature and access data available to all registered users.

CVSS severity6.3
Medium
EPSS probability0.64%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper access control in Nextcloud OpenID Connect user backend 1.3.6 and earlier allows attackers to register accounts through ID4me. Id4meController invokes its showLogin, login, and code routes without checking whether the id4me_enabled setting is disabled. An unauthenticated requester who can reach the Nextcloud server can use the disabled feature and access data available to all registered users.

The record

CVE
CVE-2024-37312
Published
Jun 14, 2024
Updated
Aug 2, 2024
Vendor
Nextcloud GmbH
Product
Security Advisories
Classifications
CWE-284, T1136
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 14, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=<= 1.3.6

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Nextcloud GmbH · Security Advisoriesversion=<= 1.3.6
Nextcloud GmbH · OpenID Connect user backendversion=0 <=1.3.6

Published CVSS scores

6.3GitHub, Inc.CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-284Improper Access Control
T1136Create Account

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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