CVE-2024-22402Network attack vector

Guest allowlist bypass via encoded request paths

Published Jan 18, 2024 · Updated Jun 9, 2025

Improper URL handling in Nextcloud Guests 2.4.0, 2.5.0, and 3.0.0 allows remote authenticated users to open disallowed app pages via crafted URLs. The app allowlist checks an encoded request path instead of its decoded form, so percent-encoded path characters evade the route restriction. A guest account is required; exposure is limited to an installed disallowed app's first page, while subsequent API calls remain blocked.

CVSS severity5.4
Medium
EPSS probability0.51%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper URL handling in Nextcloud Guests 2.4.0, 2.5.0, and 3.0.0 allows remote authenticated users to open disallowed app pages via crafted URLs. The app allowlist checks an encoded request path instead of its decoded form, so percent-encoded path characters evade the route restriction. A guest account is required; exposure is limited to an installed disallowed app's first page, while subsequent API calls remain blocked.

The record

CVE
CVE-2024-22402
Published
Jan 18, 2024
Updated
Jun 9, 2025
Vendor
Nextcloud GmbH
Product
Security Advisories
Classifications
CWE-281, CWE-177
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 18, 2024CVE publishedPublication date reported by the CVE source.
  2. Jun 9, 2025Record 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=>= 2.4.0, < 2.4.1
  2. Affected versionversion=>= 2.5.0, < 2.5.1
  3. Affected versionversion=>= 3.0.0, < 3.0.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Nextcloud GmbH · Security Advisoriesversion=>= 2.4.0, < 2.4.1; version=>= 2.5.0, < 2.5.1; version=>= 3.0.0, < 3.0.1

Published CVSS scores

5.4GitHubCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

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

Weakness, pattern, technique

CWE-281Improper Preservation of Permissions
CWE-177Improper Handling of URL Encoding (Hex Encoding)

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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