What’s Vulnerable › Vulnerabilities

CVE-2024-22403: OAuth2 authorization codes are valid indefinetly in Nextcloud server

• Severity: low (CVSS 3.7 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-01-18 · updated 2026-06-17
• Weakness: CWE-613

Description

Nextcloud server is a self hosted personal cloud system. In affected versions OAuth codes did not expire. When an attacker would get access to an authorization code they could authenticate at any time using the code. As of version 28.0.0 OAuth codes are invalidated after 10 minutes and will no longer be authenticated. To exploit this vulnerability an attacker would need to intercept an OAuth code from a user session. It is recommended that the Nextcloud Server is upgraded to 28.0.0. There are no known workarounds for this vulnerability.

Affected products

• Nextcloud Server: before 28.0.0 — fixed in 28.0.0

How to fix

Upgrade to a fixed version: Nextcloud Server 28.0.0. Check the vendor advisory for mitigations.

References

• https://github.com/nextcloud/security-advisories/security/advisories/GHSA-wppc-f5g8-vx36
• https://github.com/nextcloud/server/pull/40766
• https://hackerone.com/reports/1784162
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/S6PN4GVJ5TZUC6WSG4X3ZA3AMPBEKNAX/
• https://github.com/nextcloud/security-advisories/security/advisories/GHSA-wppc-f5g8-vx36
• https://github.com/nextcloud/server/pull/40766
• https://hackerone.com/reports/1784162
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/S6PN4GVJ5TZUC6WSG4X3ZA3AMPBEKNAX/

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