← Vulnerability feed

Vulnerability record · CVE-2026-22198 · published 9 January 2026

CVE-2026-22198: Gestsup cross-site scripting vulnerability

GGestsup · Gestsup

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.

5.1 CVSS 4.0 Medium EPSS 0.30% · top 79.8% CWE-79 · Cross-site scripting
5.1CVSS 4.0 base score
0.30%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

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.

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://gestsup.fr/index.php?page=changelog Release Notes
https://www.vulncheck.com/advisories/gestsup-stored-xss-in-api-error-logs Third Party Advisory

Track CVE-2026-22198 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2021-31646Gestsup improper restriction of authentication attempts vulnerabilityGestsup before 3.2.10 allows account takeover through the password recovery functionality (remote). The affected component is the file forgot_pwd.php…EPSS 1.3%8.9CVE-2026-22194Gestsup cross-site request forgery vulnerabilityGestSup versions up to and including 3.2.60 contain a cross-site request forgery (CSRF) vulnerability where the application does not verify the authe…EPSS 0.24%7.7CVE-2026-22196Gestsup sql injection vulnerabilityGestSup versions prior to 3.2.60 contain a SQL injection vulnerability in ticket creation functionality. User-controlled input provided during ticket…EPSS 0.32%7.7CVE-2026-22195Gestsup sql injection vulnerabilityGestSup versions prior to 3.2.60 contain a SQL injection vulnerability in the search bar functionality. User-controlled search input is incorporated …EPSS 0.32%7.5CVE-2026-22197Gestsup sql injection vulnerabilityGestSup versions prior to 3.2.60 contain multiple SQL injection vulnerabilities in the asset list functionality. Multiple request parameters used to …EPSS 0.33%5.4CVE-2023-52059Gestsup cross-site scripting vulnerabilityA cross-site scripting (XSS) vulnerability in Gestsup v3.2.46 allows attackers to execute arbitrary web scripts or HTML via a crafted payload injecte…EPSS 0.39%4.3CVE-2023-52060Gestsup cross-site request forgery vulnerabilityA Cross-Site Request Forgery (CSRF) in Gestsup v3.2.46 allows attackers to arbitrarily edit user profile information via a crafted request.EPSS 0.26%6.1CVE-2026-42897Microsoft Exchange Server XSS enables spoofingMicrosoft Exchange Server and Exchange Server Subscription Edition fail to neutralize input during web page generation, a cross-site scripting flaw (…KEVEPSS 0.52%analysed

Source: NIST National Vulnerability Database (record CVE-2026-22198), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.