GHSA-9rwj-9j2h-fhvm is a medium-severity (CVSS 6.1) Cross-site Scripting (XSS) vulnerability in tui-grid. 1 public exploit or proof-of-concept reference is indexed, so weaponization risk is real. A fix is available for tui-grid — see the affected versions and patch details below.
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-9rwj-9j2h-fhvm.
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
Where this sits among everything scored
Real-World Exposure
How broadly this vulnerability is actually deployed: weekly install volume shows current usage, a proxy for how much of the ecosystem is exposed.
tui-gridnpmDescription
Toast UI Grid is a component to display and edit data. Versions prior to 4.21.3 are vulnerable to cross-site scripting attacks when pasting specially crafted content into editable cells. This issue was fixed in version 4.21.3. There are no known workarounds.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 📦npm | tui-grid | all versions | 4.21.3npm install tui-grid@4.21.3 |
Affected Products
toast ui gridnhnResearch use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for tui-grid, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update tui-grid to 4.21.3 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-9rwj-9j2h-fhvm 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-9rwj-9j2h-fhvm in your dependencies?
Find it across npm, including transitive dependencies.