CVE-2026-22198

MEDIUM

6.1

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.

Details CVE

Score CVSS v3.16.1

SeveriteMEDIUM

Vecteur CVSSCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Vecteur d'attaqueNETWORK

ComplexiteLOW

Privileges requisNONE

Interaction utilisateurREQUIRED

Publie1/9/2026

Derniere modification1/14/2026

Sourcenvd

Observations honeypot0

Produits affectes

gestsup:gestsup

Faiblesses (CWE)

CWE-79

References

https://gestsup.fr/index.php?page=changelog(disclosure@vulncheck.com)

https://www.vulncheck.com/advisories/gestsup-stored-xss-in-api-error-logs(disclosure@vulncheck.com)

Correlations IOC

Aucune correlation enregistree

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