CVE-2025-49137

Hax CMS Stored Cross-Site Scripting vulnerability

MEDIUM
6.1
CVSS Score
Published: June 9, 2025 at 09:00 PM UTC
Updated: June 17, 2026 at 09:30 AM UTC
3 products affected across 2 vendorsHaxcms Node.jsHaxcms PHPHAX CMS

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Severity
MEDIUM6.1
Exploit prediction
EPSS 0.3%
SSVC
PoC

Description

HAX CMS PHP allows users to manage their microsite universe with a PHP backend. Prior to version 11.0.0, the application does not sufficiently sanitize user input, allowing for the execution of arbitrary JavaScript code. The 'saveNode' and 'saveManifest' endpoints take user input and store it in the JSON schema for the site. This content is then rendered in the generated HAX site. Although the application does not allow users to supply a `script` tag, it does allow the use of other HTML tags to run JavaScript. Version 11.0.0 fixes the issue.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 11.0.0
Affected range stops below 11.0.0, so it looks safe — our inference, not a vendor statement
v < 11.0.0
Affected range stops below 11.0.0, so it looks safe — our inference, not a vendor statement
v < 11.0.0
Affected range stops below 11.0.0, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCPoCNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-79CWE-80CWE-87

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