CVE-2026-22198CWE-79

GestSup < 3.2.60 Stored XSS in API Error Logs

Medium · published January 9, 2026

CVSS v4.0
5.1
EPSS
0%
Percentile
20.8
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
5.1 · MEDIUM
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
EPSS
0.00294 · 20.8th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-01-09T16:19Z
EPSS history
Timeline
  • 09 JAN 16:19Z
    GestSup < 3.2.60 Stored XSS in API Error Logs
    cvelistv5