CVE-2023-32686 — kiwitcms
HIGHCVE-2023-32686 is a high-severity (CVSS 8.1) 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 CVE-2023-32686.
EPSS Exploitation Probability
EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.
How urgent is this, really
CVE-2023-32686 plotted by exploitation likelihood (EPSS) against impact (CVSS). The shaded corner — EPSS 50%+ and CVSS 7.0+ — is where this CVE doesn't sit, though severity or exploitability alone can still warrant action.
Where this sits among everything scored
Of 378,156 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Real counts from FIRST.org, not a sample — log-scaled since the landscape is heavily right-skewed.
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' |
Detection & 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 CVE-2023-32686 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like CVE-2023-32686 can be triaged on real exposure rather than presence alone.
Tailored to CVE-2023-32686. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is CVE-2023-32686 in your dependencies?
O3 Security finds CVE-2023-32686 across PyPI dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.