CVE-2026-22198

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. 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.

6.1 /10

CVSS v3 : MEDIUM

V3 Legend

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

17 Jun 2026, 10:19

Type Values Removed Values Added
Summary
  • (es) Las versiones de GestSup anteriores a la 3.2.60 contienen una vulnerabilidad de cross-site scripting (XSS) almacenado de preautenticación en la funcionalidad de registro de errores de la API. Al enviar una solicitud de API con un valor de encabezado X-API-KEY manipulado (por ejemplo, a /api/v1/ticket.php), un atacante no autenticado puede hacer que HTML/JavaScript controlado por el atacante se escriba en las entradas de registro. Cuando un administrador ve posteriormente los registros afectados en la interfaz web, el contenido inyectado se renderiza sin una codificación de salida adecuada, lo que resulta en la ejecución arbitraria de scripts en la sesión del navegador del administrador.

14 Jan 2026, 19:43

Type Values Removed Values Added
References () https://gestsup.fr/index.php?page=changelog - () https://gestsup.fr/index.php?page=changelog - Release Notes
References () https://www.vulncheck.com/advisories/gestsup-stored-xss-in-api-error-logs - () https://www.vulncheck.com/advisories/gestsup-stored-xss-in-api-error-logs - Third Party Advisory
CPE cpe:2.3:a:gestsup:gestsup:*:*:*:*:*:*:*:*
First Time Gestsup gestsup
Gestsup
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 6.1

14 Jan 2026, 17:16

Type Values Removed Values Added
Summary (en) GestSup versions up to and including 3.2.56 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. (en) 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.

09 Jan 2026, 17:15

Type Values Removed Values Added
New CVE
Information

Published : 2026-01-09 17:15

Updated : 2026-06-17 10:19

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')