GHSA-r29h-37fj-x2w6
GHSA-r29h-37fj-x2w6 is a CWE-80 vulnerability in open-webui. O3 Security confirms whether GHSA-r29h-37fj-x2w6 is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
Open WebUI Has Stored Cross-Site Scripting in SVG Renderer
Exploitation Status
Proof-of-concept exploit code exists
- CISA’s SSVC triage found public proof-of-concept exploit code for this CVE, though no confirmed active exploitation.
Exploitation and automatability from CISA’s SSVC triage for GHSA-r29h-37fj-x2w6.
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.
Real-World Exposure
How broadly this vulnerability is actually deployed: weekly install volume shows current usage, and reverse-dependency count shows how many other packages break if it stays unpatched.
open-webuinpmDescription
Summary
There is a Cross-Site Scripting vulnerability in Open WebUI SVG renderer implementation.
Details
It is possible permanently save any HTML/JavaScript code in the application, which can be then executed in the context of the application domain. This behaviour can be used to extract and steal sensitive data from the application, manipulate DOM tree or being used in complex client-side attacks.
Detailed step-by-step instruction provided below. Please keep me updated about assigned CVE identifier. I'd like to be credited as: Jakub Żoczek [Securitum]
PoC
Steps to reproduce:
To reproduce this vulnerability you need to:
- Login to Open WebUI
- Start new conversation / thread
- Use prompt: "Hey. Can you draw me a green circle using SVG ?"
- SVG image should be generated.
- Now it's possible to edit the code by simply clicking on it and adding additional code. Add payload
<img src=a onerror=alert(document.domain)> - The whole code should look like this:
<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg">
<circle cx="50" cy="50" r="40" fill="green"/>
</svg><img src="a" onerror="alert(document.domain)">ok</img>
- Now clicking "Save", the new image should get rendered, and malicious code - executed (by popping alert).
Such thread could be then shared and sent to other users.
Impact
Cross-Site Scripting allows attacker to execute malicious code in context of victim's browser. This way it could be used in malicious client-side attack achieving different things, depends on attacker's goal. Such thread with rendered SVG could be shared to other user (or administrator) and gain sensitive data or even takeover someone's account.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 📦npm | open-webui | all versions | 0.6.31 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for open-webui. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.
Fix
Update open-webui to 0.6.31 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-r29h-37fj-x2w6 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 pinpoints whether GHSA-r29h-37fj-x2w6 is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.
Tailored to GHSA-r29h-37fj-x2w6. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is GHSA-r29h-37fj-x2w6 in your dependencies?
O3 detects GHSA-r29h-37fj-x2w6 across npm dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.