EUVD-2026-23015
GHSA-mj7r-x3h3-7rmr
Severity by source
AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
Primary rating from GitHub Advisory · only source for this CVE.
CVSS VectorGitHub Advisory
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6DescriptionGitHub Advisory
ApostropheCMS is an open-source Node.js content management system. Versions 4.28.0 and prior contain a timing side-channel vulnerability in the password reset endpoint (/api/v1/@apostrophecms/login/reset-request) that allows unauthenticated username and email enumeration. When a user is not found, the handler returns after a fixed 2-second artificial delay, but when a valid user is found, it performs a MongoDB update and SMTP email send with no equivalent delay normalization, producing measurably different response times. The endpoint also accepts both username and email via an $or query, and has no rate limiting as the existing checkLoginAttempts throttle only applies to the login flow. This enables automated enumeration of valid accounts for use in credential stuffing or targeted phishing. Only instances that have explicitly enabled the passwordReset option are affected, as it defaults to false. This issue has been fixed in version 4.29.0.
AnalysisAI
User enumeration via a timing side channel in ApostropheCMS versions 4.28.0 and prior allows unauthenticated attackers to identify valid usernames and emails. The password reset endpoint fails to normalize response time when a valid user is found, enabling an attacker to distinguish valid accounts from invalid ones by repeatedly probing the endpoint. This can facilitate credential stuffing and targeted phishing against instances that have explicitly enabled the password reset feature.
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Same weakness CWE-208 – Observable Timing Discrepancy
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