What’s Vulnerable › Vulnerabilities

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

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-07-16 · updated 2026-06-17
• Weakness: CWE-1333

Description

chatwoot is vulnerable to Inefficient Regular Expression Complexity

Affected products

• chatwoot/chatwoot: before 1.18.0 — fixed in 1.18.0

How to fix

Upgrade to a fixed version: chatwoot/chatwoot 1.18.0. Check the vendor advisory for mitigations.

References

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

Get alerted when CVE-2021-3649 or the next vulnerability affects your stack