How severe is CVE-2024-22403?

CVE-2024-22403 has a CVSS 3.x base score of 3.0, rated low severity. It is exploitable over network with high attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2024-22403 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (36th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-22403?

CVE-2024-22403 affects Nextcloud Nextcloud Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2024-22403?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2024-22403 have an EU (EUVD) identifier?

Yes. CVE-2024-22403 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-19958.

When was CVE-2024-22403 published?

CVE-2024-22403 was published on 2024-01-18 and last updated on 2026-06-17.

CVE-2024-22403

CVE-2024-22403 is a low-severity vulnerability in Nextcloud Nextcloud Server with a CVSS 3.x base score of 3.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-613.

Key facts

Severity: Low (CVSS 3.x base score 3.0)
EPSS exploit prediction: 0% (36th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-19958
Weakness: CWE-613
Affected product: Nextcloud Nextcloud Server
Published: 2024-01-18
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2024-22403?: 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.
How severe is CVE-2024-22403?: CVE-2024-22403 has a CVSS 3.x base score of 3.0, rated low severity. It is exploitable over network with high attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2024-22403 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (36th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-22403?: CVE-2024-22403 affects Nextcloud Nextcloud Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2024-22403?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2024-22403 have an EU (EUVD) identifier?: Yes. CVE-2024-22403 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-19958.
When was CVE-2024-22403 published?: CVE-2024-22403 was published on 2024-01-18 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:*:*:*:*

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