---
id: CVE-2023-36809
aliases:
  - GHSA-jpgw-2r9m-8qfw
  - PYSEC-2026-1499
title: Kiwi TCMS's misconfigured HTTP headers allow stored XSS execution with Firefox
summary: Kiwi TCMS's misconfigured HTTP headers allow stored XSS execution with Firefox
severity: high
cvss: 8.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N'
vendor: kiwitcms
product: kiwitcms
ecosystem: pip
affected:
  - kiwitcms < 12.5
patched:
  - kiwitcms 12.5
published: '2023-07-05'
updated: '2026-07-07'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/GHSA-jpgw-2r9m-8qfw'
references:
  - url: 'https://github.com/kiwitcms/Kiwi/security/advisories/GHSA-jpgw-2r9m-8qfw'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2023-36809'
  - url: >-
      https://github.com/kiwitcms/kiwi/commit/195ea53eaaf360c19227c864cc0fe58910032c3c
  - url: >-
      https://github.com/kiwitcms/kiwi/commit/ffb00450be52fe11a82a2507632c2328cae4ec9d
  - url: 'https://github.com/kiwitcms/Kiwi'
  - url: 'https://huntr.dev/bounties/511489dd-ba38-4806-9029-b28ab2830aa8'
  - url: 'https://huntr.dev/bounties/c6eeb346-fa99-4d41-bc40-b68f8d689223'
  - url: 'https://kiwitcms.org/blog/kiwi-tcms-team/2023/07/04/kiwi-tcms-125'
  - url: >-
      https://www.github.com/kiwitcms/kiwi/commit/195ea53eaaf360c19227c864cc0fe58910032c3c
  - url: >-
      https://www.github.com/kiwitcms/kiwi/commit/ffb00450be52fe11a82a2507632c2328cae4ec9d
tags:
  - osv
  - pip
epss: 0.00692
epssPercentile: 0.50772
ingestedAt: '2026-07-08T18:25:50.843Z'
---

## Overview

### Impact

Kiwi TCMS allows users to upload attachments to test plans, test cases, etc. Earlier versions of Kiwi TCMS had introduced
changes which were meant to serve all uploaded files as plain text in order to prevent browsers from executing potentially dangerous files when such files are accessed directly! 

The previous Nginx configuration was incorrect allowing certain browsers like Firefox to ignore the `Content-Type: text/plain` header on some occasions thus allowing potentially dangerous scripts to be executed. 

Additionally file upload validators and parts of the HTML rendering code have been found to require additional sanitation and improvements.

### Patches

- Updated Nginx content type configuration
- Improved file upload validation code to prevent more potentially dangerous uploads
- Sanitization of test plan names used in the `tree_view_html()` function

### References

Disclosed by [M Nadeem Qazi](https://huntr.dev/bounties/511489dd-ba38-4806-9029-b28ab2830aa8/) and
[Mahshooq Zubair](https://huntr.dev/bounties/c6eeb346-fa99-4d41-bc40-b68f8d689223/).

## Affected packages

- `kiwitcms < 12.5`

## Remediation

Upgrade to a patched release:

- `kiwitcms 12.5`