# CVE-2025-54134: HAX CMS NodeJS improper error handling denial of service

Source: https://junglewise.ai/threats/cve-2025-54134-hax-cms-nodejs-improper-error-handling-denial-of-service  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2025-07-21. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2025-54134 · Severity: medium · CVSS 4 · Published 2025-07-21

HAX CMS is a content management system used to build and host websites. An authenticated attacker can crash the application's backend server by sending specially-crafted requests to file management endpoints without required parameters, rendering the system and all hosted websites unavailable to legitimate users.

Technologies: [@haxtheweb/haxcms-nodejs (npm)](https://junglewise.ai/threats/technologies/haxtheweb-haxcms-nodejs). Vendors: [HAX](https://junglewise.ai/threats/vendors/hax), [npm](https://junglewise.ai/threats/vendors/npm).

## Quick answers

**Is CVE-2025-54134 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2025-54134 being exploited in the wild.

**How severe is CVE-2025-54134?** Medium severity, with a CVSS score of 4, published 21 July 2025.

**Which products and versions are affected?** HAX CMS NodeJS <=11.0.8; @haxtheweb/haxcms-nodejs (npm) SEMVER:introduced=0,fixed=11.0.9.

**Is there a fix for CVE-2025-54134?** Yes. @haxtheweb/haxcms-nodejs (npm): upgrade to 11.0.9 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2025-54134 attacked?** It is attacked over the network.

**Am I affected by CVE-2025-54134?** Check whether you run HAX CMS NodeJS or @haxtheweb/haxcms-nodejs (npm) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- @haxtheweb/haxcms-nodejs (npm): upgrade to 11.0.9 or later

  ```sh
  npm install @haxtheweb/haxcms-nodejs@11.0.9
  ```


## Technical details

This vulnerability exists in the listFiles and saveFile API endpoints, which fail to properly handle exceptions when required URL parameters are missing or malformed. An authenticated attacker can trigger an ERR_INVALID_ARG_TYPE exception by sending requests without the expected parameters, causing the Node.js backend process to crash. The vulnerability requires low-level authentication credentials but no user interaction. Exploitation results in complete denial of service for all users of the backend system and any websites it hosts. A patch is available in version 11.0.9 and later.

## Affected products

- HAX CMS NodeJS <=11.0.8

## Identifiers

- CVE-2025-54134
- GHSA-pjj3-j5j6-qj27

## Timeline

- 2025-07-21: disclosed

## References

- [https://github.com/haxtheweb/issues/security/advisories/GHSA-pjj3-j5j6-qj27](https://github.com/haxtheweb/issues/security/advisories/GHSA-pjj3-j5j6-qj27)

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