CVE-2026-46511: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in haxtheweb haxcms-nodejs
HAX CMS helps manage microsite universe with PHP or NodeJs backends. Prior to version 26.0.0, an attack chain utilizing Stored XSS alongside dynamic token exposure in the `/system/api/connectionSettings` endpoint allows an authenticated attacker to perform a complete cross-tenant account takeover. The API dynamically leaks the active session's authentication tokens (including the `jwt`, `user_token`, `site_token`, and `appstore_token`) into a global JavaScript variable (`window.appSettings`). An attacker can exploit the XSS vulnerability to force a victim's browser to silently fetch their specific connection settings, extract the tokens, and exfiltrate them to an attacker-controlled webhook. Version 26.0.0 patches the issue.
AI Analysis
Technical Summary
The vulnerability in haxtheweb haxcms-nodejs (CVE-2026-46511) involves improper neutralization of input during web page generation (CWE-79), enabling stored XSS. An authenticated attacker can exploit this by injecting malicious scripts that cause a victim's browser to fetch their connection settings from the `/system/api/connectionSettings` endpoint. This endpoint leaks sensitive authentication tokens (jwt, user_token, site_token, appstore_token) into a global JavaScript variable (`window.appSettings`). The attacker can then exfiltrate these tokens to an attacker-controlled webhook, resulting in a complete cross-tenant account takeover. The issue is fixed in version 26.0.0.
Potential Impact
Successful exploitation allows an authenticated attacker to steal multiple authentication tokens from other tenants, leading to full cross-tenant account takeover. This compromises confidentiality and integrity of user sessions and data across tenants.
Mitigation Recommendations
Upgrade to haxtheweb haxcms-nodejs version 26.0.0 or later, where this vulnerability is patched. No other official remediation or temporary fixes are indicated. Until upgraded, restrict authenticated user privileges and monitor for suspicious activity related to token exposure.
CVE-2026-46511: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in haxtheweb haxcms-nodejs
Description
HAX CMS helps manage microsite universe with PHP or NodeJs backends. Prior to version 26.0.0, an attack chain utilizing Stored XSS alongside dynamic token exposure in the `/system/api/connectionSettings` endpoint allows an authenticated attacker to perform a complete cross-tenant account takeover. The API dynamically leaks the active session's authentication tokens (including the `jwt`, `user_token`, `site_token`, and `appstore_token`) into a global JavaScript variable (`window.appSettings`). An attacker can exploit the XSS vulnerability to force a victim's browser to silently fetch their specific connection settings, extract the tokens, and exfiltrate them to an attacker-controlled webhook. Version 26.0.0 patches the issue.
CVSS v4.0
Score 8.7high
Affected software
pkg:github/haxtheweb/haxcms-nodejsRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in haxtheweb haxcms-nodejs (CVE-2026-46511) involves improper neutralization of input during web page generation (CWE-79), enabling stored XSS. An authenticated attacker can exploit this by injecting malicious scripts that cause a victim's browser to fetch their connection settings from the `/system/api/connectionSettings` endpoint. This endpoint leaks sensitive authentication tokens (jwt, user_token, site_token, appstore_token) into a global JavaScript variable (`window.appSettings`). The attacker can then exfiltrate these tokens to an attacker-controlled webhook, resulting in a complete cross-tenant account takeover. The issue is fixed in version 26.0.0.
Potential Impact
Successful exploitation allows an authenticated attacker to steal multiple authentication tokens from other tenants, leading to full cross-tenant account takeover. This compromises confidentiality and integrity of user sessions and data across tenants.
Mitigation Recommendations
Upgrade to haxtheweb haxcms-nodejs version 26.0.0 or later, where this vulnerability is patched. No other official remediation or temporary fixes are indicated. Until upgraded, restrict authenticated user privileges and monitor for suspicious activity related to token exposure.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-05-14T19:12:32.754Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a231d8ee29bf47b50a98418
Added to database: 06/05/2026, 19:03:42 UTC
Last enriched: 06/13/2026, 09:49:28 UTC
Last updated: 07/31/2026, 19:22:59 UTC
Views: 79
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.