CVE-2024-21838 Cross-site scripting in Command Centre Server

Medium 6.8 Published 5 Mar 2024 Updated 1 Aug 2024

Attackers can inject HTML into generated emails via the Command Centre Server, potentially executing malicious scripts in recipients' email clients.

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-2024-21838?

CVE-2024-21838 is a medium-severity cross-site scripting vulnerability in Gallagher Command Centre Server, published on 5 Mar 2024. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

Official description

Improper neutralization of special elements in output (CWE-74) used by the email generation feature of the Command Centre Server could lead to HTML code injection in emails generated by Command Centre.

This issue affects: Gallagher Command Centre 9.00 prior to vEL9.00.1774 (MR2), 8.90 prior to vEL8.90.1751 (MR3), 8.80 prior to vEL8.80.1526 (MR4), 8.70 prior to vEL8.70.2526 (MR6), all version of 8.60 and prior.

Weakness: CWE-79, CWE-74

Which versions are affected by CVE-2024-21838?

It affects 1 product.

Products include Gallagher Command Centre.

How do I fix CVE-2024-21838?

No fix has been published for CVE-2024-21838 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-2024-21838 being exploited?

There is no known exploitation of CVE-2024-21838 in the wild and no public exploit code.

Sources

Also known as GHSA-jg3j-pgx3-878w.