CVE-2026-33877

The record

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.

Affected packages

Related vulnerabilities

• GHSA-mj7r-x3h3-7rmr ApostropheCMS: User Enumeration via Timing Side Channel in Password Reset Endpoint Same vulnerability
• CVE-2026-45013 ApostropheCMS is an open-source Node.js content management system. Also affects apostrophe
• CVE-2026-45012 ApostropheCMS is an open-source Node.js content management system. Also affects apostrophe
• CVE-2026-45011 ApostropheCMS is an open-source Node.js content management system. Also affects apostrophe
• GHSA-5f64-7vfc-rcx6 Apostrophe has stored XSS via javascript: URL in Image Widget Link Also affects apostrophe
• GHSA-gf43-24g3-5hw2 Apostrophe has a Weak Password Recovery Mechanism for Forgotten Password and Improper… Also affects apostrophe
• GHSA-pr28-mf3q-qpg6 Apostrophe has authenticated SSRF in rich-text widget import via… Also affects apostrophe
• GHSA-c276-fj82-f2pq ApostropheCMS: Information Disclosure via choices/counts Query Parameters Bypassing… Also affects apostrophe