{"cve":"CVE-2019-7550","nvd":{"published":"2019-02-12T20:29:00.323","modified":"2026-06-17T02:40:41.227","status":"Modified","description":"In JForum 2.1.8, an unauthenticated, remote attacker can enumerate whether a user exists by using the \"create user\" function. If a register/check/username?username= request corresponds to a username that exists, then an \"is already in use\" error is produced. NOTE: this product is discontinued.","cvss_v4":null,"cvss_v3":{"version":"3.0","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","score":5.3},"cwes":["CWE-209"],"references":["https://www.criticalstart.com/2019/02/information-disclosure-in-jforum-2-1-x-syntax/","https://www.criticalstart.com/2019/02/information-disclosure-in-jforum-2-1-x-syntax/"],"products":["jforum:jforum"],"source":"nvd","synced_at":"2026-10-19T20:54:46.948512734+00:00"},"epss":{"cve":"CVE-2019-7550","score":0.01842,"percentile":0.79016,"date":"2026-10-31"},"kev":null,"osv":[],"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."]}