CVE-2025-32028: HAX CMS PHP allows Insecure File Upload to Lead to Remote Code Execution

Severity: critical (CVSS 9.9 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.0% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2025-04-08 · updated 2026-06-17
Weakness: CWE-434

Description

HAX CMS PHP allows you to manage your microsite universe with PHP backend. Multiple file upload functions within the HAX CMS PHP application call a ’save’ function in ’HAXCMSFile.php’. This save function uses a denylist to block specific file types from being uploaded to the server. This list is non-exhaustive and only blocks ’.php’, ’.sh’, ’.js’, and ’.css’ files. The existing logic causes the system to "fail open" rather than "fail closed." This vulnerability is fixed in 10.0.3.

Affected products

haxtheweb haxcms-php: from 9.0.0 before 10.0.3 — fixed in 10.0.3

How to fix

Upgrade to a fixed version: haxtheweb haxcms-php 10.0.3. Check the vendor advisory for mitigations.

References

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