8.1

CVSS Score

3.1

-

CVSS Score

Basic Information

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CVE-2023-39655

CVE-2023-39655: CouchAuth host header injection vulnerability leaks the password reset token

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.

(GitHub Advisory)

Miggo Vulnerability Database

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CVE-2023-39655

CVE-2023-39655:

8.1

CVSS Score

3.1

-

CVSS Score

Basic Information

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Technical Details

Package Name	Ecosystem	Vulnerable Versions	First Patched Version
@perfood/couch-auth	npm	<= 0.20.0

Technical Details

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Root Cause Analysis

The vulnerability stems from improper validation of the Host header when constructing password reset links. The forgotPassword handler would be responsible for processing reset requests and initiating email sending, while the email system would use this untrusted Host value to build reset URLs. This matches the CWE-74 injection pattern described, where special elements (host header) are not neutralized before being used in downstream components (email generation). The high confidence comes from the vulnerability description explicitly linking host header manipulation to malicious reset links, which requires these two functional components to be involved in the URL construction process.

Vulnerable functions

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WAF Protection Rules

WAF Rule

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Reasoning

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