Security Resilience

CVE-2024-22403

Nextcloud Server ≤ 28.0.0

Published
18 January 2024
Modified
17 June 2026
Patch / advisory
View advisory
CVSS Score v3.1 3.0
Click a component to see what it means
Raw vectorCVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:N/A:N
EPSS Score 0.0045 38th percentile
Risk Priority 27 floored blend · peak EPSS

CVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.

Summary

CVE-2024-22403 is a low-severity Insufficient Session Expiration (CWE-613) vulnerability in Nextcloud Nextcloud Server. Its CVSS base score is 3.0 (Low).

Operationally, exploitation aligns with the MITRE ATT&CK technique Data Obfuscation (T1001); ranked at the 38th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified map to AC-12 (Session Termination) — see the control section below for these in your framework.

OWASP Top 10 for Web (2025)

A07:2025 Authentication Failures

EU & UK References

Vulnerability Data

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…

more

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.

CWE(s)
CWE-613

Related Threats

MITRE ATT&CK Enterprise Techniques

T1001 Data Obfuscation Command And Control
Adversaries may obfuscate command and control traffic to make it more difficult to detect.
attack.mitre.org →
T1003 OS Credential Dumping Credential Access
Adversaries may attempt to dump credentials to obtain account login and credential material, normally in the form of a hash or a clear text password.
attack.mitre.org →
T1003.001 LSASS Memory Credential Access
Adversaries may attempt to access credential material stored in the process memory of the Local Security Authority Subsystem Service (LSASS).
attack.mitre.org →
T1003.005 Cached Domain Credentials Credential Access
Adversaries may attempt to access cached domain credentials used to allow authentication to occur in the event a domain controller is unavailable.
attack.mitre.org →
T1007 System Service Discovery Discovery
Adversaries may try to gather information about registered local system services.
attack.mitre.org →
T1011.001 Exfiltration Over Bluetooth Exfiltration
Adversaries may attempt to exfiltrate data over Bluetooth rather than the command and control channel.
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2023-32318Same product: Nextcloud Nextcloud Server
CVE-2023-28833Same product: Nextcloud Nextcloud Server
CVE-2023-28834Same product: Nextcloud Nextcloud Server
CVE-2025-66512Same product: Nextcloud Nextcloud Server
CVE-2025-59788Same product: Nextcloud Nextcloud Server
CVE-2023-28835Same product: Nextcloud Nextcloud Server
CVE-2026-45279Same product: Nextcloud Nextcloud Server
CVE-2023-25579Same product: Nextcloud Nextcloud Server
CVE-2025-66552Same product: Nextcloud Nextcloud Server
CVE-2024-37882Same product: Nextcloud Nextcloud Server

Affected Assets

nextcloud
nextcloud server
≤ 28.0.0

Mitigating Controls

Mitigating Controls (NIST 800-53 r5) AI

AC-12 Session Termination good match

AC-12 directly requires automatic session termination after a defined period, structurally preventing reuse of expired session identifiers.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.AA-01 partial match
blocks

Credential lifecycle management directly includes enforcing session expiration to prevent reuse.

PR.AA-03 partial match
blocks

Authentication mechanisms can incorporate session timeout checks but do not inherently address expiration policy.

PR.AA-05 partial match
blocks

Authorization policy enforcement and review covers terminating stale sessions to limit access scope.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.5.14 Information transfer partial match
removes
A.5.15 Access control partial match
removes
A.5.16 Identity management partial match
removes
A.5.17 Authentication information partial match
removes
A.5.18 Access rights partial match
removes
A.8.10 Information deletion partial match
removes

References