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.

PUBLISHED Reserved 2026-01-06 | Published 2026-01-09 | Updated 2026-01-14 | Assigner VulnCheck

Problem types

CWE-79 Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting')

Product status

Credits

Geoffrey Robert and Valentin Holubec of Akailabs finder

VulnCheck coordinator

References

gestsup.fr/index.php?page=changelog release-notes

www.vulncheck.com/...es/gestsup-stored-xss-in-api-error-logs third-party-advisory

cve.org (CVE-2026-22198)

nvd.nist.gov (CVE-2026-22198)

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