How severe is CVE-2026-22198?

CVE-2026-22198 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2026-22198 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (17th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-22198?

CVE-2026-22198 affects Gestsup. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-22198?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-22198 have an EU (EUVD) identifier?

Yes. CVE-2026-22198 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-1703.

When was CVE-2026-22198 published?

CVE-2026-22198 was published on 2026-01-09 and last updated on 2026-06-17.

CVE-2026-22198

CVE-2026-22198 is a medium-severity vulnerability in Gestsup with a CVSS 3.x base score of 6.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
CVSS v4: 5.1
EPSS exploit prediction: 0% (17th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-1703
Weakness: CWE-79
Affected product: Gestsup
Published: 2026-01-09
Last modified: 2026-06-17

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.

Frequently asked questions

What is 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.
How severe is CVE-2026-22198?: CVE-2026-22198 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2026-22198 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (17th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-22198?: CVE-2026-22198 affects Gestsup. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-22198?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-22198 have an EU (EUVD) identifier?: Yes. CVE-2026-22198 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-1703.
When was CVE-2026-22198 published?: CVE-2026-22198 was published on 2026-01-09 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:gestsup:gestsup:*:*:*:*:*:*:*:*

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