CVE-2023-49804Public exploit

Account access via persistent authenticated sessions

Published Dec 11, 2023 · Updated Oct 9, 2024

Improper session invalidation in Louis Lam Uptime Kuma before 1.23.9 allows attackers to retain account access after a password change. The password-change handler updates the stored password but leaves other authenticated Socket.IO connections alive instead of refreshing and disconnecting them. An attacker must already control a logged-in session; that session retains read-write access across browser and server restarts after the account owner changes the password.

CVSS severity6.7
Medium
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper session invalidation in Louis Lam Uptime Kuma before 1.23.9 allows attackers to retain account access after a password change. The password-change handler updates the stored password but leaves other authenticated Socket.IO connections alive instead of refreshing and disconnecting them. An attacker must already control a logged-in session; that session retains read-write access across browser and server restarts after the account owner changes the password.

The record

CVE
CVE-2023-49804
Published
Dec 11, 2023
Updated
Oct 9, 2024
Vendor
Louis Lam
Product
Uptime Kuma
Classifications
CWE-384, T1078
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Dec 11, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 9, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 1.23.9

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

Louis Lam · Uptime Kumaversion=< 1.23.9

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
6.7GitHub, Inc.CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-384Session Fixation
T1078Valid Accounts

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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