CVE-2023-49804: Uptime Kuma Password Change Vulnerability

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-12-11 · updated 2026-06-17
Weakness: CWE-384

Description

Uptime Kuma is an easy-to-use self-hosted monitoring tool. Prior to version 1.23.9, when a user changes their login password in Uptime Kuma, a previously logged-in user retains access without being logged out. This behavior persists consistently, even after system restarts or browser restarts. This vulnerability allows unauthorized access to user accounts, compromising the security of sensitive information. The same vulnerability was partially fixed in CVE-2023-44400, but logging existing users out of their accounts was forgotten. To mitigate the risks associated with this vulnerability, the maintainers made the server emit a `refresh` event (clients handle this by reloading) and then disconnecting all clients except the one initiating the password change. It is recommended to update Uptime Kuma to version 1.23.9.

Affected products

Dockge.Kuma Dockge: before 1.3.3 — fixed in 1.3.3
Uptime.Kuma Uptime Kuma: before 1.23.9 — fixed in 1.23.9

How to fix

Upgrade to a fixed version: Dockge.Kuma Dockge 1.3.3; Uptime.Kuma Uptime Kuma 1.23.9. Check the vendor advisory for mitigations.

References

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