What’s Vulnerable › Vulnerabilities

CVE-2026-63216: Zammad: Stored XSS via unescaped option labels in the object attribute options context UI

• Severity: medium (CVSS 5.3 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-25 · updated 2026-09-29
• Weakness: CWE-80

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.

Affected products

• zammad: before 7.1.2

References

• https://github.com/zammad/zammad/commit/74b4fd4db62dc3652bb9db24096a2fbd1b56dc7f
• https://github.com/zammad/zammad/security/advisories/GHSA-r95m-ghj7-646x

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