CVE-2023-22288 Email HTML Injection
An authenticated attacker can inject malicious HTML into Checkmk emails, potentially leading to XSS attacks against recipients.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2023-22288?
CVE-2023-22288 is a medium-severity cross-site scripting vulnerability in Checkmk Checkmk, published on 20 Mar 2023. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official 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
Which versions are affected by CVE-2023-22288?
It affects 2 products.
Products include Checkmk Checkmk, Tribe29 Checkmk.
How do I fix CVE-2023-22288?
No fix has been published for CVE-2023-22288 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2023-22288 being exploited?
There is no known exploitation of CVE-2023-22288 in the wild and no public exploit code.
Other vulnerabilities in Checkmk Checkmk
- CVE-2025-39666 omd: Local privilege escalation when executing omd commands as root
- CVE-2024-8606 Fix 2FA bypass via RestAPI
- CVE-2022-46836 PHP code injection in watolib
- CVE-2025-32919 Privilege Escalation in Windows License plugin for Checkmk Windows Agent
- CVE-2024-28827 Privilege escalation in Windows agent
Sources
Also known as GHSA-3g55-gxf8-m8xp, UBUNTU-CVE-2023-22288.