CVE-2023-44400 — Uptime Kuma is a self-hosted monitoring tool

Uptime Kuma is a self-hosted monitoring tool. Prior to version 1.23.3, attackers with access to a user's device can gain persistent account access. This is caused by missing verification of Session Tokens after password changes and/or elapsed inactivity periods. Version 1.23

01What is this vulnerability?

Uptime Kuma is a self-hosted monitoring tool. Prior to version 1.23.3, attackers with access to a user's device can gain persistent account access. This is caused by missing verification of Session Tokens after password changes and/or elapsed inactivity periods. Version 1.23.3 has a patch for the issue.

02Affected products

Vendor	Product	Versions
louislam	uptime	kuma — < 1.23.3

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2023-10-09T15:15:07.450Z
• Last modified: 2024-09-18T20:18:45.881Z

09References

• github.com — https://github.com/louislam/uptime-kuma/security/advisories/GHSA-g9v2-wqcj-j99g
• github.com — https://github.com/louislam/uptime-kuma/issues/3481
• github.com — https://github.com/louislam/uptime-kuma/commit/88afab6571ef7d4d41bb395cdb6ecd396…