GHSA-x7c2-7wvg-jpx7 — kiwitcms
MEDIUMGHSA-x7c2-7wvg-jpx7 is a medium-severity (CVSS 5.4) Cross-site Scripting (XSS) vulnerability in kiwitcms. A fix is available for kiwitcms — see the affected versions and patch details below.
kiwitcms vulnerable to stored XSS via unrestricted files upload
Exploitation Status
No confirmed exploitation observed yet
- A successful exploit gives an attacker total control of the affected component, not partial access.
- CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.
Exploitation and automatability from CISA’s SSVC triage for GHSA-x7c2-7wvg-jpx7.
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
GHSA-x7c2-7wvg-jpx7 by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.
Where this sits among everything scored
Of 379,842 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Counts from FIRST.org, log-scaled.
Real-World Exposure
kiwitcmsReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects PyPI packages — download data is not available via public APIs for these ecosystems.
Description
Impact
Kiwi TCMS allows users to upload attachments to test plans, test cases, etc. Earlier versions of Kiwi TCMS had introduced upload validators in order to prevent potentially dangerous files from being uploaded, see GHSA-fwcf-753v-fgcj and Content-Security-Policy definition to prevent cross-site-scripting attacks, see GHSA-2wcr-87wf-cf9j.
The upload validation checks were not robust enough which left the possibility of an attacker to circumvent them and upload a potentially dangerous file. Exploting this flaw a combination of files could be uploaded so that they work together to circumvent the existing Content-Security-Policy and allow execution of arbitrary JavaScript in the browser.
Patches
- File upload validation code has been improved
- Kiwi TCMS will now force
Content-Type: text/plainwhen serving uploaded files
Workarounds
- Force the Content-Type header via a custom Django middleware, see
ExtraHeadersMiddlewarein https://github.com/kiwitcms/Kiwi/blob/master/tcms/core/middleware.py#L23 and/or - Force the Content-Type header via Nginx overrides, see
location /uploads/in https://github.com/kiwitcms/Kiwi/blob/master/etc/nginx.conf
References
Disclosed by Antonio Spataro and ek1ng. Additional credits to Ahmed Rabeaa Mosa.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐍PyPI | kiwitcms | all versions | 12.3pip install --upgrade 'kiwitcms==12.3' |
Affected Products
kiwi tcmskiwitcmsDetection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for kiwitcms, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update kiwitcms to 12.3 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-x7c2-7wvg-jpx7 is resolved across your whole dependency graph.
Workarounds
Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page.
Frequently Asked Questions
Is GHSA-x7c2-7wvg-jpx7 in your dependencies?
Find it across PyPI, including transitive dependencies.