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

published 2026-03-20 7 mo ago modified 2026-06-17 4 mo ago also EUVD-2026-13622

cvss: 5.8; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.2%; EPSS 0.2% chance of exploitation in 30 days, percentile 6%
public exploits: 0; none known

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.

Patch / fix

links 1

github.com/Jexactyl/Jexactyl@e28edb2 commit

CISA SSVC

Exploitation: Proof of concept is public
Automatable: no
Technical impact: total
Assessed: 7 mo ago (2026-03-20)

Exploit prediction

0.17% chance of exploitation in the next 30 days, higher than 6% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

github.com https://github.com/Jexactyl/Jexactyl/security/advisories/GHSA-6xgw-mmmv-57h2 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	3.1	5.8	CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:N
NVD	3.1	5.4	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Affected products

Jexactyl Jexactyl

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation

References

github.com /Jexactyl/Jexactyl/commit/e28edb204e80efab628d1241198ea4f079779cfd
patch
github.com /Jexactyl/Jexactyl/security/advisories/GHSA-6xgw-mmmv-57h2
exploit, vendor-advisory

Sources

CVE List CVE-2026-33061
NVD CVE-2026-33061

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary