Vulnerability Details 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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.002
EPSS Ranking 44.9%
CVSS Severity
CVSS v3 Score 6.1
References
Products affected by CVE-2026-22198
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cpe:2.3:a:gestsup:gestsup:-
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cpe:2.3:a:gestsup:gestsup:3.1.15
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cpe:2.3:a:gestsup:gestsup:3.1.16
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cpe:2.3:a:gestsup:gestsup:3.1.17
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cpe:2.3:a:gestsup:gestsup:3.1.18
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cpe:2.3:a:gestsup:gestsup:3.1.19
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cpe:2.3:a:gestsup:gestsup:3.1.20
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cpe:2.3:a:gestsup:gestsup:3.1.21
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cpe:2.3:a:gestsup:gestsup:3.1.22
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cpe:2.3:a:gestsup:gestsup:3.1.23
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cpe:2.3:a:gestsup:gestsup:3.1.24
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cpe:2.3:a:gestsup:gestsup:3.1.25
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cpe:2.3:a:gestsup:gestsup:3.1.26
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cpe:2.3:a:gestsup:gestsup:3.1.27
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cpe:2.3:a:gestsup:gestsup:3.1.28
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cpe:2.3:a:gestsup:gestsup:3.1.29
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cpe:2.3:a:gestsup:gestsup:3.1.30
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cpe:2.3:a:gestsup:gestsup:3.1.31
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cpe:2.3:a:gestsup:gestsup:3.1.32
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cpe:2.3:a:gestsup:gestsup:3.1.33
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cpe:2.3:a:gestsup:gestsup:3.1.34
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cpe:2.3:a:gestsup:gestsup:3.1.35
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cpe:2.3:a:gestsup:gestsup:3.1.36
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cpe:2.3:a:gestsup:gestsup:3.1.37
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cpe:2.3:a:gestsup:gestsup:3.1.38
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cpe:2.3:a:gestsup:gestsup:3.1.39
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cpe:2.3:a:gestsup:gestsup:3.1.40
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cpe:2.3:a:gestsup:gestsup:3.1.41
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cpe:2.3:a:gestsup:gestsup:3.1.42
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cpe:2.3:a:gestsup:gestsup:3.1.43
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cpe:2.3:a:gestsup:gestsup:3.1.44
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cpe:2.3:a:gestsup:gestsup:3.1.45
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cpe:2.3:a:gestsup:gestsup:3.1.46
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cpe:2.3:a:gestsup:gestsup:3.1.47
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cpe:2.3:a:gestsup:gestsup:3.1.48
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cpe:2.3:a:gestsup:gestsup:3.1.49
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cpe:2.3:a:gestsup:gestsup:3.1.50
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cpe:2.3:a:gestsup:gestsup:3.2.0
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cpe:2.3:a:gestsup:gestsup:3.2.1
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cpe:2.3:a:gestsup:gestsup:3.2.10
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cpe:2.3:a:gestsup:gestsup:3.2.11
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cpe:2.3:a:gestsup:gestsup:3.2.12
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cpe:2.3:a:gestsup:gestsup:3.2.13
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cpe:2.3:a:gestsup:gestsup:3.2.14
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cpe:2.3:a:gestsup:gestsup:3.2.15
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cpe:2.3:a:gestsup:gestsup:3.2.16
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cpe:2.3:a:gestsup:gestsup:3.2.17
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cpe:2.3:a:gestsup:gestsup:3.2.18
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cpe:2.3:a:gestsup:gestsup:3.2.19
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cpe:2.3:a:gestsup:gestsup:3.2.2
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cpe:2.3:a:gestsup:gestsup:3.2.20
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cpe:2.3:a:gestsup:gestsup:3.2.21
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cpe:2.3:a:gestsup:gestsup:3.2.22
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cpe:2.3:a:gestsup:gestsup:3.2.23
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cpe:2.3:a:gestsup:gestsup:3.2.24
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cpe:2.3:a:gestsup:gestsup:3.2.25
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cpe:2.3:a:gestsup:gestsup:3.2.26
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cpe:2.3:a:gestsup:gestsup:3.2.27
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cpe:2.3:a:gestsup:gestsup:3.2.28
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cpe:2.3:a:gestsup:gestsup:3.2.29
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cpe:2.3:a:gestsup:gestsup:3.2.3
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cpe:2.3:a:gestsup:gestsup:3.2.30
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cpe:2.3:a:gestsup:gestsup:3.2.31
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cpe:2.3:a:gestsup:gestsup:3.2.32
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cpe:2.3:a:gestsup:gestsup:3.2.33
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cpe:2.3:a:gestsup:gestsup:3.2.34
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cpe:2.3:a:gestsup:gestsup:3.2.35
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cpe:2.3:a:gestsup:gestsup:3.2.36
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cpe:2.3:a:gestsup:gestsup:3.2.37
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cpe:2.3:a:gestsup:gestsup:3.2.38
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cpe:2.3:a:gestsup:gestsup:3.2.39
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cpe:2.3:a:gestsup:gestsup:3.2.4
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cpe:2.3:a:gestsup:gestsup:3.2.40
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cpe:2.3:a:gestsup:gestsup:3.2.41
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cpe:2.3:a:gestsup:gestsup:3.2.42
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cpe:2.3:a:gestsup:gestsup:3.2.43
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cpe:2.3:a:gestsup:gestsup:3.2.44
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cpe:2.3:a:gestsup:gestsup:3.2.45
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cpe:2.3:a:gestsup:gestsup:3.2.46
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cpe:2.3:a:gestsup:gestsup:3.2.47
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cpe:2.3:a:gestsup:gestsup:3.2.48
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cpe:2.3:a:gestsup:gestsup:3.2.49
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cpe:2.3:a:gestsup:gestsup:3.2.5
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cpe:2.3:a:gestsup:gestsup:3.2.50
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cpe:2.3:a:gestsup:gestsup:3.2.51
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cpe:2.3:a:gestsup:gestsup:3.2.52
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cpe:2.3:a:gestsup:gestsup:3.2.53
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cpe:2.3:a:gestsup:gestsup:3.2.54
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cpe:2.3:a:gestsup:gestsup:3.2.55
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cpe:2.3:a:gestsup:gestsup:3.2.56
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cpe:2.3:a:gestsup:gestsup:3.2.6
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cpe:2.3:a:gestsup:gestsup:3.2.7
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cpe:2.3:a:gestsup:gestsup:3.2.8
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cpe:2.3:a:gestsup:gestsup:3.2.9