{"cve":"CVE-2026-33877","nvd":{"published":"2026-04-15T20:16:35.517","modified":"2026-10-26T22:10:00.163","status":"Analyzed","description":"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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N","score":3.7},"cwes":["CWE-208"],"references":["https://github.com/apostrophecms/apostrophe/commit/e266cffd8c0d331a9b05c92bf11616556efcdc77","https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-mj7r-x3h3-7rmr","https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-mj7r-x3h3-7rmr"],"products":["apostrophecms:apostrophecms"],"source":"nvd","synced_at":"2026-10-26T22:26:44.656832877+00:00"},"epss":{"cve":"CVE-2026-33877","score":0.00365,"percentile":0.30105,"date":"2026-10-26"},"kev":null,"osv":[{"id":"GHSA-mj7r-x3h3-7rmr","url":"https://osv.dev/vulnerability/GHSA-mj7r-x3h3-7rmr","summary":"ApostropheCMS: User Enumeration via Timing Side Channel in Password Reset Endpoint","modified":"2026-04-16T21:11:30.123665Z","packages":[{"ecosystem":"npm","name":"apostrophe","purl":"pkg:npm/apostrophe","ranges":["<4.29.0"],"fixed":["4.29.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}