CVE-2025-49139: @haxtheweb/haxcms-nodejs Iframe Phishing vulnerability

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2025-06-09 · updated 2026-06-17
Weakness: CWE-1021

Description

HAX CMS PHP allows users to manage their microsite universe with a PHP backend. Prior to version 11.0.0, in the HAX site editor, users can create a website block to load another site in an iframe. The application allows users to supply a target URL in the website block. When the HAX site is visited, the client's browser will query the supplied URL. An authenticated attacker can create a HAX site with a website block pointing at an attacker-controlled server running Responder or a similar tool. The attacker can then conduct a phishing attack by convincing another user to visit their malicious HAX site to harvest credentials. Version 11.0.0 contains a patch for the issue.

Affected products

haxtheweb haxcms-nodejs: before 11.0.0 — fixed in 11.0.0
haxtheweb haxcms-php: before 11.0.0 — fixed in 11.0.0

How to fix

Upgrade to a fixed version: haxtheweb haxcms-nodejs 11.0.0; haxtheweb haxcms-php 11.0.0. Check the vendor advisory for mitigations.

References

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