CVE-2023-49805: Uptime Kuma is an easy-to-use self-hosted monitoring tool

Q: How do I fix CVE-2023-49805?

dockge: upgrade to 1.3.3; uptime kuma: upgrade to 1.23.9. Exact commands for each OS are on this page.

Q: Is CVE-2023-49805 being exploited?

CVE-2023-49805 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2023-49805 affect?

CVE-2023-49805 affects dockge, uptime kuma. Severity is medium (CVSS 6.0). Uptime Kuma is an easy-to-use self-hosted monitoring tool. Prior to version 1.23.9, the application uses WebSocket (with Socket.io), but it does not verify that the source of communication is valid. This allows third-party website to access

Q: How urgent is CVE-2023-49805?

Priority 34/100. Public exploit reference

Routine

MEDIUM 6.0UPGRADEUPGRADE

CVE-2023-49805 is a medium-severity flaw (CVSS 6.0) affecting dockge, uptime kuma. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Uptime Kuma is an easy-to-use self-hosted monitoring tool. Prior to version 1.23.9, the application uses WebSocket (with Socket.io), but it does not verify that the source of communication is valid. This allows third-party website to access the application on behalf of their client. When connecting to the server using Socket.IO, the server does not validate the `Origin` header leading to other site being able to open connections to the server and

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	6.0 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
User interaction	None
EPSS exploit chance	0.4% (top 68%)
CISA exploited list	No
Weakness	CWE-1385, CWE-346
Published	2023-12-11
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: dockge.kuma · uptime.kuma

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2023-12-11 23:15 UTCPublished CVE record published
2026-06-17 06:36 UTCUpdated Record last modified

dockge.kuma dockge UPGRADE

Affected: < 1.3.3

Fixed in: 1.3.3

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy dockge || rpm -q dockge || dockge --version

2. UPGRADE to 1.3.3 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade dockge

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade dockge

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

uptime.kuma uptime kuma UPGRADE

Affected: < 1.23.9

Fixed in: 1.23.9

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy uptime-kuma || rpm -q uptime-kuma || uptime-kuma --version

2. UPGRADE to 1.23.9 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade uptime-kuma

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade uptime-kuma

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2023-49805?

dockge: upgrade to 1.3.3; uptime kuma: upgrade to 1.23.9. Exact commands for each OS are on this page.

Is CVE-2023-49805 being exploited?

CVE-2023-49805 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2023-49805 affect?

CVE-2023-49805 affects dockge, uptime kuma. Severity is medium (CVSS 6.0). Uptime Kuma is an easy-to-use self-hosted monitoring tool. Prior to version 1.23.9, the application uses WebSocket (with Socket.io), but it does not verify that the source of communication is valid. This allows third-party website to access

How urgent is CVE-2023-49805?

Priority 34/100. Public exploit reference

Related CVEs

CVE-2023-49804 MEDIUM 6.7 UPGRADE UPGRADE Uptime Kuma is an easy-to-use self-hosted monitoring tool

References

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