A host header injection vulnerability exists in the NPM package @perfood/couch-auth versions <= 0.20.0. By sending a specially crafted host header in the forgot password request, it is possible to send password reset links to users which, once clicked, lead to an attacker-controlled server and thus leak the password reset token. This may allow an attacker to reset other users' passwords and take over their accounts.

References

• https://nvd.nist.gov/vuln/detail/CVE-2023-39655
• https://github.com/dub-flow/vulnerability-research/tree/main/CVE-2023-39655
• https://www.npmjs.com/package/%40perfood/couch-auth