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Medium severity6.1NVD Advisory· Published Jan 9, 2026· Updated Jun 17, 2026

CVE-2026-22198

CVE-2026-22198

Description

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.

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Affected products

3
  • Gestsup/Gestsup3 versions
    cpe:2.3:a:gestsup:gestsup:*:*:*:*:*:*:*:*+ 2 more
    • cpe:2.3:a:gestsup:gestsup:*:*:*:*:*:*:*:*range: <=3.2.56
    • (no CPE)range: <3.2.60
    • (no CPE)range: 0

Patches

Vulnerability mechanics

References

2

News mentions

0

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