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A stored cross-site scripting (XSS) vulnerability exists in versions prior to 26.0.0 due to improper sanitization of `<iframe>` elements. The application allows `javascrip…","description":"HAX CMS helps manage microsite universe with PHP or NodeJs backends. A stored cross-site scripting (XSS) vulnerability exists in versions prior to 26.0.0 due to improper sanitization of `<iframe>` elements. The 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. Version 26.0.0 fixes the issue.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N","score":9.3,"severity":null}],"references":["https://github.com/haxtheweb/issues/security/advisories/GHSA-jh3h-rpxg-fr36"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-34891","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Jun 5, 2026, 6:44:28 PM","dateUpdated":"Jun 9, 2026, 2:36:27 PM"},"relatedAdvisories":[],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON."},"key":"euvd:EUVD-2026-34891","identifiers":["EUVD-2026-34891","CVE-2026-46396","GHSA-jh3h-rpxg-fr36"]},"retained":false,"historicalAffected":[]},{"revision":"8072845f207d41589b09168123277d8f","observedAt":"2026-10-25T12:17:14.897+00:00","statement":{"source":"nvd","id":"CVE-2026-46396","aliases":[],"title":"HAX CMS helps manage microsite universe with PHP or NodeJs backends. A stored cross-site scripting (XSS) vulnerability exists in versions prior to 26.0.0 due to improper sanitization of `<iframe>` elements. The application allows `javascrip…","description":"HAX CMS helps manage microsite universe with PHP or NodeJs backends. A stored cross-site scripting (XSS) vulnerability exists in versions prior to 26.0.0 due to improper sanitization of `<iframe>` elements. The 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. 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Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-46396","identifiers":["CVE-2026-46396"]},"retained":false,"historicalAffected":[]},{"revision":"d5051220e9094085ba6d1cfa68a49f64","observedAt":"2026-10-24T13:17:17.793+00:00","statement":{"source":"osv","id":"GHSA-jh3h-rpxg-fr36","aliases":["CVE-2026-46396"],"title":"Stored XSS via <iframe> in HAX CMS allows access to sensitive client-side data and account takeover","description":"### Summary\nA stored cross-site scripting (XSS) vulnerability exists in HAX CMS due to improper sanitization of `<iframe>` 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 (`<>`).\n4. Insert the following payload:\n\n```html\n<iframe srcdoc=\"&lt;script&gt;\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&lt;/script&gt;\" style=\"display:none\" sandbox=\"allow-scripts allow-same-origin\"></iframe>\n```\n<img width=\"2446\" height=\"1319\" alt=\"image\" src=\"https://github.com/user-attachments/assets/daea3b41-8c72-4f6c-ab32-34c688bbd251\" />\n\n\n<img width=\"2464\" height=\"1397\" alt=\"image\" src=\"https://github.com/user-attachments/assets/911cbd42-db50-454a-b178-51555e0db79c\" />\n\n\n\n<img width=\"2466\" height=\"1409\" alt=\"webhook`\" src=\"https://github.com/user-attachments/assets/8a286435-98f4-418c-a596-d0c19556696a\" />\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.","state":0,"publishedAt":"2026-05-19T14:46:47+00:00","modifiedAt":"2026-09-10T03:51:06.237355+00:00","affected":[{"ecosystem":"npm","name":"@haxtheweb/haxcms-nodejs","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"26.0.0"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"npm","name":"@haxtheweb/video-player","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"26.0.0"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"npm","name":"@haxtheweb/iframe-loader","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"26.0.0"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V4","vector":"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","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"HIGH"}],"references":["https://github.com/haxtheweb/issues/security/advisories/GHSA-jh3h-rpxg-fr36","https://nvd.nist.gov/vuln/detail/CVE-2026-46396","https://github.com/haxtheweb/issues"],"sourceUrl":"https://github.com/advisories/GHSA-jh3h-rpxg-fr36","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-jh3h-rpxg-fr36","identifiers":["GHSA-jh3h-rpxg-fr36","CVE-2026-46396"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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