CVE-2023-36809
Kiwi TCMS's misconfigured HTTP headers allow stored XSS execution with Firefox
Kiwi TCMS, an open source test management system allows users to upload attachments to test plans, test cases, etc. Versions of Kiwi TCMS prior to 12.5 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 had been found to require additional sanitation and improvements. Version 12.5 fixes this vulnerability with updated Nginx content type configuration, improved file upload validation code to prevent more potentially dangerous uploads, and Sanitization of test plan names used in the tree_view_html() function.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
8.1
Kiwi TCMS's misconfigured HTTP headers allow stored XSS execution with Firefox
Kiwi TCMS, an open source test management system allows users to upload attachments to test plans, test cases, etc. Versions of Kiwi TCMS prior to 12.5 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 had been found to require additional sanitation and improvements. Version 12.5 fixes this vulnerability with updated Nginx content type configuration, improved file upload validation code to prevent more potentially dangerous uploads, and Sanitization of test plan names used in the tree_view_html() function.
- Record
CVE-2023-36809- CVSS 3.1
- 8.1 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N - Weakness
- CWE-79, CWE-434
- Updated
- 2026-11-02
EUVDEUVD-2023-2090
8.1
Kiwi TCMS, an open source test management system allows users to upload attachments to test plans, test cases, etc. Versions of Kiwi TCMS prior to 12.5 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 had been found to require additional sanitation and improvements. Version 12.5 fixes this vulnerability with updated Nginx content type configuration, improved file upload validation code to prevent more potentially dangerous uploads, and Sanitization of test plan names used in the tree_view_html() function.
- Record
EUVD-2023-2090- CVSS 3.1
- 8.1 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-jpgw-2r9m-8qfw
8.1
Kiwi TCMS's misconfigured HTTP headers allow stored XSS execution with Firefox
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 and Mahshooq Zubair.
- Record
GHSA-jpgw-2r9m-8qfw- CVSS 3.1
- 8.1 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N - Weakness
- CWE-79, CWE-434
- Updated
- 2026-11-02
NVD
8.1
Kiwi TCMS, an open source test management system allows users to upload attachments to test plans, test cases, etc. Versions of Kiwi TCMS prior to 12.5 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 had been found to require additional sanitation and improvements. Version 12.5 fixes this vulnerability with updated Nginx content type configuration, improved file upload validation code to prevent more potentially dangerous uploads, and Sanitization of test plan names used in the tree_view_html() function.
- Record
CVE-2023-36809- CVSS 3.1
- 8.1 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N - CVSS 3.1
- 5.4 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N - Weakness
- CWE-79, CWE-434
- Updated
- 2026-11-02
OSV
8.1
Kiwi TCMS's misconfigured HTTP headers allow stored XSS execution with Firefox
Kiwi TCMS, an open source test management system allows users to upload attachments to test plans, test cases, etc. Versions of Kiwi TCMS prior to 12.5 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 had been found to require additional sanitation and improvements. Version 12.5 fixes this vulnerability with updated Nginx content type configuration, improved file upload validation code to prevent more potentially dangerous uploads, and Sanitization of test plan names used in the tree_view_html() function.
- Record
CVE-2023-36809- CVSS 3.1
- 8.1 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N - Weakness
- CWE-434, CWE-79
- Updated
- 2026-11-02
OSVGHSA-jpgw-2r9m-8qfw
8.1
Kiwi TCMS's misconfigured HTTP headers allow stored XSS execution with Firefox
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 and Mahshooq Zubair.
- Record
GHSA-jpgw-2r9m-8qfw- CVSS 3.1
- 8.1 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N - Weakness
- CWE-434, CWE-79
- Updated
- 2026-11-02
OSVPYSEC-2026-1499
8.1
Kiwi TCMS's misconfigured HTTP headers allow stored XSS execution with Firefox
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 and Mahshooq Zubair.
- Record
PYSEC-2026-1499- CVSS 3.1
- 8.1 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
kiwitcmsPyPI |
before 12.5 | 12.5 |
kiwitcmsPyPI |
before 12.5, plus listed versions 10.010.110.210.310.3.999 Show 44 moreShow less10.410.511.011.111.311.411.511.611.712.012.112.212.312.46.106.116.2.16.36.46.56.5.36.66.76.86.97.07.17.27.2.17.38.08.18.1.998.28.38.48.58.68.6.18.78.88.99.09.999 |
12.5 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases, products, published | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2023-36809 is a high vulnerability (CVSS 8.1) in Kiwitcms Kiwi, published July 5, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.69%, the 53rd percentile. Fixed in kiwitcms 12.5.
References
github.com/kiwitcms/Kiwi/security/advisories/GHSA-jpgw-2r9m-8qfw
huntr.dev/bounties/511489dd-ba38-4806-9029-b28ab2830aa8
huntr.dev/bounties/c6eeb346-fa99-4d41-bc40-b68f8d689223
kiwitcms.org/blog/kiwi-tcms-team/2023/07/04/kiwi-tcms-125
github.com/kiwitcms/kiwi/commit/195ea53eaaf360c19227c864cc0fe58910032c3c
github.com/kiwitcms/kiwi/commit/ffb00450be52fe11a82a2507632c2328cae4ec9d