CVE-2026-22198: GestSup < 3.2.60 Stored XSS in API Error Logs
GestSup versions prior to 3.2.60 contain a pre-authentication stored cross-site scripting (XSS) vulnerability in the API error logging functionality. By sending an API request with a crafted X-API-KEY header value (for example, to /api/v1/ticket.php), an unauthenticated attacker can cause attacker-controlled HTML/JavaScript to be written to log entries. When an administrator later views the affected logs in the web interface, the injected content is rendered without proper output encoding, resulting in arbitrary script execution in the administrator’s browser session.
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2026-22198?
CVE-2026-22198 is classified as a high-severity vulnerability due to its potential for pre-authentication stored cross-site scripting.
How do I fix CVE-2026-22198?
To fix CVE-2026-22198, upgrade GestSup to version 3.2.57 or later, which addresses this vulnerability.
What are the risks associated with CVE-2026-22198?
The risks of CVE-2026-22198 include the potential for attackers to execute malicious scripts in the context of users visiting the affected application.
Who is affected by CVE-2026-22198?
Any instance of GestSup versions up to and including 3.2.56 is affected by CVE-2026-22198.
What type of vulnerability is CVE-2026-22198?
CVE-2026-22198 is a pre-authentication stored cross-site scripting (XSS) vulnerability.