CVE-2024-22212Network attack vector

Account impersonation via empty-password token creation

Published Jan 18, 2024 · Updated Sep 11, 2024

Authentication bypass in affected Nextcloud Global Site Selector releases allows remote attackers to assume another user's identity. SlaveController::createAppToken treats an empty password as successful without first requiring the decoded JWT options to select the SAML backend, then generates an application token for the supplied existing user ID. Exploitation requires user interaction but no prior privileges, and a successful request grants access as the selected account.

CVSS severity9.6
Critical
EPSS probability0.76%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in affected Nextcloud Global Site Selector releases allows remote attackers to assume another user's identity. SlaveController::createAppToken treats an empty password as successful without first requiring the decoded JWT options to select the SAML backend, then generates an application token for the supplied existing user ID. Exploitation requires user interaction but no prior privileges, and a successful request grants access as the selected account.

The record

CVE
CVE-2024-22212
Published
Jan 18, 2024
Updated
Sep 11, 2024
Vendor
Nextcloud GmbH
Product
Security Advisories
Classifications
CWE-306, CWE-288, T1078
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 18, 2024CVE publishedPublication date reported by the CVE source.
  2. Sep 11, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=>= 1.1.0, < 1.4.1
  2. Affected versionversion=>= 2.0.0, < 2.1.2
  3. Affected versionversion=>= 2.2.0, < 2.3.4
  4. Affected versionversion=>= 2.4.0, < 2.4.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Nextcloud GmbH · Security Advisoriesversion=>= 1.1.0, < 1.4.1; version=>= 2.0.0, < 2.1.2; version=>= 2.2.0, < 2.3.4; version=>= 2.4.0, < 2.4.5

Published CVSS scores

9.6GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
9.8NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-306Missing Authentication for Critical Function
CWE-288Authentication Bypass Using an Alternate Path or Channel
T1078Valid Accounts

Public exploit references

No public exploit references are available in this record.

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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