{"id":"GHSA-jh3h-rpxg-fr36","summary":"Stored XSS via \u003ciframe\u003e in HAX CMS allows access to sensitive client-side data and account takeover","details":"### Summary\nA stored cross-site scripting (XSS) vulnerability exists in HAX CMS due to improper sanitization of `\u003ciframe\u003e` elements.\n\nThe application allows `javascript:` URIs in the `src` attribute, which are executed when a malicious page is viewed. This enables attackers to execute arbitrary JavaScript in the context of the victim’s browser and access sensitive data exposed to client-side scripts.\n\n### Details\nSuccessful exploitation allows access to any data available in the browser context, including:\n\n- Authentication tokens (e.g., JWT)\n- Session cookies (if not protected with HttpOnly)\n- Application configuration (e.g., window.appSettings)\n- User-specific data accessible via APIs\n\nThis significantly increases the impact beyond simple script execution.\n\n### PoC\nSteps to reproduce:\n\n1. Log in to HAX CMS as any authenticated user.\n2. Create a new page or edit an existing page.\n3. Open the HTML source editor (`\u003c\u003e`).\n4. Insert the following payload:\n\n```html\n\u003ciframe srcdoc=\"<script>\n    (function(){\n        try {\n            var jwt = parent.window.appSettings.jwt;\n            alert('Stolen JWT:\\n' + jwt);\n        } catch(e) {\n            alert('Error: ' + e.message);\n        }\n    })();\n</script>\" style=\"display:none\" sandbox=\"allow-scripts allow-same-origin\"\u003e\u003c/iframe\u003e\n```\n\u003cimg width=\"2446\" height=\"1319\" alt=\"image\" src=\"https://github.com/user-attachments/assets/daea3b41-8c72-4f6c-ab32-34c688bbd251\" /\u003e\n\n\n\u003cimg width=\"2464\" height=\"1397\" alt=\"image\" src=\"https://github.com/user-attachments/assets/911cbd42-db50-454a-b178-51555e0db79c\" /\u003e\n\n\n\n\u003cimg width=\"2466\" height=\"1409\" alt=\"webhook`\" src=\"https://github.com/user-attachments/assets/8a286435-98f4-418c-a596-d0c19556696a\" /\u003e\n\n### Impact\nThis vulnerability allows stored XSS leading to:\n\n- Execution of arbitrary JavaScript in victim browsers\n- Access to sensitive client-side data, including authentication tokens and session identifiers\n- Unauthorized API actions performed on behalf of the victim\n- Session hijacking and full account takeover\n\nBecause the application exposes authentication data in the client-side environment, exploitation of this vulnerability can lead to complete compromise of user accounts and site content.","aliases":["CVE-2026-46396"],"modified":"2026-09-10T03:51:06.237354969Z","published":"2026-05-19T14:46:47Z","database_specific":{"cwe_ids":["CWE-79"],"severity":"HIGH","github_reviewed":true,"github_reviewed_at":"2026-05-19T14:46:47Z","nvd_published_at":"2026-06-05T19:16:33Z"},"references":[{"type":"WEB","url":"https://github.com/haxtheweb/issues/security/advisories/GHSA-jh3h-rpxg-fr36"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-46396"},{"type":"PACKAGE","url":"https://github.com/haxtheweb/issues"}],"affected":[{"package":{"name":"@haxtheweb/haxcms-nodejs","ecosystem":"npm","purl":"pkg:npm/%40haxtheweb/haxcms-nodejs"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"26.0.0"}]}],"database_specific":{"last_known_affected_version_range":"\u003c= 25.0.0","source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-jh3h-rpxg-fr36/GHSA-jh3h-rpxg-fr36.json"}},{"package":{"name":"@haxtheweb/video-player","ecosystem":"npm","purl":"pkg:npm/%40haxtheweb/video-player"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"26.0.0"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-jh3h-rpxg-fr36/GHSA-jh3h-rpxg-fr36.json","last_known_affected_version_range":"\u003c= 25.0.0"}},{"package":{"name":"@haxtheweb/iframe-loader","ecosystem":"npm","purl":"pkg:npm/%40haxtheweb/iframe-loader"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"26.0.0"}]}],"database_specific":{"last_known_affected_version_range":"\u003c= 25.0.0","source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-jh3h-rpxg-fr36/GHSA-jh3h-rpxg-fr36.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"}]}