CVE-2026-22198

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.

CVSS v3 6.1 MEDIUM

6.1^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 2.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://gestsup.fr/index.php?page=changelog	Release Notes
https://www.vulncheck.com/advisories/gestsup-stored-xss-in-api-error-logs	Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:gestsup:gestsup:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-01-09 17:15

Updated : 2026-01-14 19:43

NVD link : CVE-2026-22198

Mitre link : CVE-2026-22198

CVE.ORG link : CVE-2026-22198

JSON object : View

Products Affected

gestsup

gestsup

CWE

CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

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