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

{
  "id": "defb8fc352570aaac0bbbc057262db8ca5808d4cf4f9753053164bd5c52f241e",
  "url": "https://osv.dev/vulnerability/CVE-2026-33061",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Jexactyl has Stored DOM Cross-Site Scripting (XSS) via unescaped JSON in Blade template",
    "summary": "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.",
    "evidence": "osv:CVE-2026-33061",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-33061",
      "aliases": [
        "CVE-2026-33061",
        "GHSA-6xgw-mmmv-57h2"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/jexactyl/jexactyl",
              "type": "GIT",
              "events": [
                {
                  "introduced": "025e8dbb0daaa04054276bda814d922cf4af58da"
                },
                {
                  "fixed": "e28edb204e80efab628d1241198ea4f079779cfd"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "025e8dbb0daaa04054276bda814d922cf4af58da"
                      },
                      {
                        "fixed": "e28edb204e80efab628d1241198ea4f079779cfd"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "range": [
                      {
                        "fixed": "e28edb204e80efab628d1241198ea4f079779cfd"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "4.0.0-beta1",
            "4.0.0-beta2",
            "4.0.0-beta3",
            "4.0.0-beta4",
            "4.0.0-beta5",
            "4.0.0-beta6",
            "4.0.0-beta7",
            "4.0.0-rc1",
            "4.0.0-rc2"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-33061.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:49.038320023Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33061.json",
        "https://github.com/Jexactyl/Jexactyl/security/advisories/GHSA-6xgw-mmmv-57h2",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-33061",
        "https://github.com/Jexactyl/Jexactyl/commit/e28edb204e80efab628d1241198ea4f079779cfd"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-79"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33061.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-33061",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 517470,
  "published_at": "2026-03-20T07:34:14.077+00:00"
}