CVE-2024-31204 mailcow Cross-site Scripting Vulnerability via Exception Handler
Attackers can inject malicious scripts into the mailcow admin panel via unsanitized exception details, leading to session hijacking and unauthorized administrative actions.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2024-31204?
CVE-2024-31204 is a medium-severity cross-site scripting vulnerability in mailcow-dockerized, published on 4 Apr 2024. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
mailcow: dockerized is an open source groupware/email suite based on docker. A security vulnerability has been identified in mailcow affecting versions prior to 2024-04. This vulnerability resides in the exception handling mechanism, specifically when not operating in DEV_MODE. The system saves exception details into a session array without proper sanitization or encoding. These details are later rendered into HTML and executed in a JavaScript block within the user's browser, without adequate escaping of HTML entities. This flaw allows for Cross-Site Scripting (XSS) attacks, where attackers can inject malicious scripts into the admin panel by triggering exceptions with controlled input. The exploitation method involves using any function that might throw an exception with user-controllable argument. This issue can lead to session hijacking and unauthorized administrative actions, posing a significant security risk. Version 2024-04 contains a fix for the issue.
Weakness: CWE-79
Which versions are affected by CVE-2024-31204?
It affects 1 product.
Products include Mailcow Mailcow\.
How do I fix CVE-2024-31204?
No fix has been published for CVE-2024-31204 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-2024-31204 being exploited?
There is no known exploitation of CVE-2024-31204 in the wild and no public exploit code.
Other vulnerabilities in mailcow-dockerized
- CVE-2025-53909 mailcow: dockerized vulnerable to SSTI in Quota and Quarantine Notification Template
- CVE-2024-24760 Mailcow Docker Container Exposure to Local Network
- CVE-2023-34108 Manipulation of Internal Dovecot Variables in mailcow via crafted Passwords
- CVE-2022-31138 OS Command Injection in mailcow
- CVE-2022-31245 Command injection in n/a
Sources
Also known as GHSA-fp6h-63w4-5hcm.