What’s Vulnerable › Vulnerabilities

CVE-2026-33061: Jexactyl has Stored DOM Cross-Site Scripting (XSS) via unescaped JSON in Blade template

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-03-20 · updated 2026-06-17
• Weakness: CWE-79

Description

Jexactyl is a customisable game management panel and billing system. Commits after 025e8dbb0daaa04054276bda814d922cf4af58da and before e28edb204e80efab628d1241198ea4f079779cfd inject server-side objects into client-side JavaScript through resources/views/templates/wrapper.blade.php. Using unescaped {!! json_encode(...) !!} without safe encoding flags allows string values to break out of the JavaScript context and be interpreted as HTML/JS by the browser. If any serialized fields contain attacker-controlled content, such as a username, display name, or site config value, a malicious payload will execute arbitrary script for any user viewing the page (stored DOM XSS). This issue has been patched by commit e28edb204e80efab628d1241198ea4f079779cfd.

Affected products

• Jexactyl: through 3.8.0; 4.0.0-beta1, 4.0.0-beta2, 4.0.0-beta3, 4.0.0-beta4, 4.0.0-beta5, 4.0.0-beta6 (+3)

References

• https://github.com/Jexactyl/Jexactyl/commit/e28edb204e80efab628d1241198ea4f079779cfd
• https://github.com/Jexactyl/Jexactyl/security/advisories/GHSA-6xgw-mmmv-57h2
• https://github.com/Jexactyl/Jexactyl/security/advisories/GHSA-6xgw-mmmv-57h2

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