GHSA-jh3h-rpxg-fr36Published

HAX CMS has a stored XSS via <iframe> that allows access to sensitive client-side data and account takeover

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cve-program · CVE-2026-46396

Published

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.

Source published: 5 Jun 2026 18:44:28 UTC
Source modified: 9 Jun 2026 14:36:27 UTC
Saved here: 23 Oct 2026 15:48:27 UTC
Source terms: CVE Program Terms of Use

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CVSS 4.0 · 9.3 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

euvd · EUVD-2026-34891

Published

Additional publisher context

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.

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datePublished: Jun 5, 2026, 6:44:28 PM

dateUpdated: Jun 9, 2026, 2:36:27 PM

Source published: Jun 5, 2026, 6:44:28 PM (timezone not stated)
Source modified: Jun 9, 2026, 2:36:27 PM (timezone not stated)
Saved here: 13 Nov 2026 13:05:44 UTC
Source terms: ENISA EUVD · source terms and attribution apply

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Source: euvd · ENISA EUVD · source terms and attribution apply. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.

EUVD CVSS 4.0 · 9.3 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

nvd · CVE-2026-46396

Published

Additional publisher context

NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON.

Source analysis status: Deferred

Weakness classifications: CWE-79

Original publisher date fields

published: 2026-06-05T19:16:33.750

lastModified: 2026-06-17T10:53:38.283

Source published: 5 Jun 2026 19:16:33 UTC
Source modified: 17 Jun 2026 10:53:38 UTC
Saved here: 25 Oct 2026 12:17:14 UTC
Source terms: NIST NVD usage terms; underlying source attribution retained

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Source: nvd · NIST NVD usage terms; underlying source attribution retained. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.

CVSS 4.0 · [email protected] · Secondary · 9.3 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

osv · GHSA-jh3h-rpxg-fr36

Published

### Summary A stored cross-site scripting (XSS) vulnerability exists in HAX CMS 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. ### Details Successful exploitation allows access to any data available in the browser context, including: - Authentication tokens (e.g., JWT) - Session cookies (if not protected with HttpOnly) - Application configuration (e.g., window.appSettings) - User-specific data accessible via APIs This significantly increases the impact beyond simple script execution. ### PoC Steps to reproduce: 1. Log in to HAX CMS as any authenticated user. 2. Create a new page or edit an existing page. 3. Open the HTML source editor (`<>`). 4. Insert the following payload: ```html <iframe srcdoc="<script> (function(){ try { var jwt = parent.window.appSettings.jwt; alert('Stolen JWT:\n' + jwt); } catch(e) { alert('Error: ' + e.message); } })(); </script>" style="display:none" sandbox="allow-scripts allow-same-origin"></iframe> ``` <img width="2446" height="1319" alt="image" src="https://github.com/user-attachments/assets/daea3b41-8c72-4f6c-ab32-34c688bbd251" /> <img width="2464" height="1397" alt="image" src="https://github.com/user-attachments/assets/911cbd42-db50-454a-b178-51555e0db79c" /> <img width="2466" height="1409" alt="webhook`" src="https://github.com/user-attachments/assets/8a286435-98f4-418c-a596-d0c19556696a" /> ### Impact This vulnerability allows stored XSS leading to: - Execution of arbitrary JavaScript in victim browsers - Access to sensitive client-side data, including authentication tokens and session identifiers - Unauthorized API actions performed on behalf of the victim - Session hijacking and full account takeover Because 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.

Source published: 19 May 2026 14:46:47 UTC
Source modified: 10 Sep 2026 03:51:06 UTC
Saved here: 24 Oct 2026 13:17:17 UTC
Source terms: GitHub Advisory Database · CC-BY-4.0

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Source: osv · GitHub Advisory Database · CC-BY-4.0. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.

CVSS_V4 · 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

Publisher rating · HIGH