CVE-2026-22198: GestSup versions prior to 3.2.60 contain a pre-authentication stored cross-site scripting (XSS) vulnerability

Q: How do I fix CVE-2026-22198?

gestsup: upgrade to newer than 3.2.56. Exact commands for each OS are on this page.

Q: Is CVE-2026-22198 being exploited?

CVE-2026-22198 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-22198 affect?

CVE-2026-22198 affects gestsup. Severity is medium (CVSS 6.1). 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/t

Q: How urgent is CVE-2026-22198?

Priority 27/100. No elevated risk signals yet.

Routine

MEDIUM 6.1UPGRADE

CVE-2026-22198 is a medium-severity flaw (CVSS 6.1) affecting gestsup. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.3% (top 78%)
CISA exploited list	No
Weakness	CWE-79
Published	2026-01-09
Last modified	2026-06-17

Publisher (CNA): VulnCheck · Vendor: gestsup

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-01-09 17:15 UTCPublished CVE record published
2026-06-17 10:19 UTCUpdated Record last modified

gestsup gestsup UPGRADE

Affected: <= 3.2.56

Fixed in: newer than 3.2.56

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy gestsup || rpm -q gestsup || gestsup --version

2. UPGRADE to newer than 3.2.56 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade gestsup

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade gestsup

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-22198?

gestsup: upgrade to newer than 3.2.56. Exact commands for each OS are on this page.

Is CVE-2026-22198 being exploited?

CVE-2026-22198 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-22198 affect?

CVE-2026-22198 affects gestsup. Severity is medium (CVSS 6.1). 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/t

How urgent is CVE-2026-22198?

Priority 27/100. No elevated risk signals yet.

Software pages

PHP vulnerabilities

Related CVEs

CVE-2026-22197 HIGH 8.1 UPGRADE GestSup versions prior to 3.2.60 contain multiple SQL injection vulnerabilities in the asset list functionalit
CVE-2026-22196 HIGH 8.1 UPGRADE GestSup versions prior to 3.2.60 contain a SQL injection vulnerability in ticket creation functionality
CVE-2026-22195 HIGH 8.1 UPGRADE GestSup versions prior to 3.2.60 contain a SQL injection vulnerability in the search bar functionality
CVE-2026-22194 HIGH 8.8 UPGRADE GestSup versions up to and including 3.2.60 contain a cross-site request forgery (CSRF) vulnerability where th

References

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