CVE-2015-3296 is a medium-severity (CVSS 6.1) Cross-site Scripting (XSS) vulnerability in nodebb. A fix is available for nodebb — see the affected versions and patch details below.
NodeBB Cross-site Scripting Vulnerability in Markdown Processing
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, and reverse-dependency count shows how many other packages break if it stays unpatched.
nodebbnpmnodebb-plugin-markdownnpmDescription
Multiple cross-site scripting (XSS) vulnerabilities in NodeBB before 0.7 allow remote attackers to inject arbitrary web script or HTML via vectors related to (1) javascript: or (2) data: URLs.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 📦npm | nodebb | all versions | 0.70npm install nodebb@0.70 |
| 📦npm | nodebb-plugin-markdown | all versions | 5.1.1npm install nodebb-plugin-markdown@5.1.1 |
Affected Products
nodebbnodebbDetection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for nodebb, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update nodebb to 0.70 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2015-3296 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 CVE-2015-3296 in your dependencies?
Find it across npm, including transitive dependencies.