CVE-2026-63216 Zammad: Stored XSS via unescaped option labels in the object attribute options context UI
Attackers can inject malicious scripts via unescaped option labels in Zammad's admin UI, executing code in admin browsers.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-63216?
CVE-2026-63216 is a medium-severity cross-site scripting vulnerability in zammad, published on 25 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Zammad is a web based open source helpdesk/customer support system. Prior to 7.1.2, unsanitized option labels are rendered in the configuration dialogs of AI Agents within Zammad's admin UI. When rendering the list of selected options, the option label is output as raw HTML without escaping. An attacker who can control an option label, for example by setting a malicious string as a user or organization name used in a relation attribute, or by supplying a crafted custom attribute option value, can inject arbitrary HTML and JavaScript. The payload executes in the browser of any admin or agent who opens the affected object attribute configuration view. This issue is fixed in version 7.1.2.
Weakness: CWE-80
Which versions are affected by CVE-2026-63216?
How do I fix CVE-2026-63216?
No fix has been published for CVE-2026-63216 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-2026-63216 being exploited?
There is no known exploitation of CVE-2026-63216 in the wild and no public exploit code.
Sources
Also known as GHSA-r95m-ghj7-646x.