🛡️ CVE-2023-22288 — checkmk

🟡 CVSS 4.1 — Medium ✅ No Known Exploit CWE-138 NVD

4.1

CVSS Score

0 Low4 Medium7 High9 Critical10

Description

HTML Email Injection in Tribe29 Checkmk <=2.1.0p23; <=2.0.0p34, and all versions of Checkmk 1.6.0 allows an authenticated attacker to inject malicious HTML into Emails

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs low-level privileges on the target. A user must be tricked into taking some action. The scope is changed, meaning a successful attack can affect components beyond the vulnerable one. Rated impact: confidentiality low, integrity none, availability none.

Weakness class

CVE-2023-22288 is classified as CWE-138: Improper Neutralization of Special Elements. The product receives input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could be interpreted as control elements or syntactic markers when they are sent to a downstream component.

Affected software

CVE-2023-22288 is recorded against 1 package.

checkmk (from 1.6.0 up to 2.0.0)

Timeline and source

Published on 20 March 2023 and last revised on 17 June 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

checkmk.com
checkmk.com

CVE-2023-22288 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Ubuntu

Details

Severity MEDIUM

CVSS Score 4.1

CVSS Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:N/A:N

CWE CWE-138

Public Exploit ✅ No

Source NVD

Published 2023-03-20

Updated 2026-08-11

Modified 2026-06-17

Fix URL N/A

Affected Packages

Software	From version	Fixed in
checkmk	1.6.0	2.0.0

References

Vendor Advisory https://checkmk.com/werk/15069

🔗 NVD 🔗 Mitre

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