{"cve":"CVE-2016-2564","nvd":{"published":"2017-04-23T15:59:00.153","modified":"2026-06-17T00:44:18.387","status":"Modified","description":"Invision Power Services (IPS) Community Suite before 4.1.9 makes session hijack easier by relying on the PHP uniqid function without the more_entropy flag. Attackers can guess an Invision Power Board session cookie if they can predict the exact time of cookie generation.","cvss_v4":null,"cvss_v3":{"version":"3.0","vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","score":5.9},"cwes":["CWE-331"],"references":["https://invisionpower.com/release-notes/419-r37/","https://medium.com/%40iancarroll/bypassing-authentication-in-invision-power-board-with-cve-2016-2564-9a24ea3655f9","https://invisionpower.com/release-notes/419-r37/","https://medium.com/%40iancarroll/bypassing-authentication-in-invision-power-board-with-cve-2016-2564-9a24ea3655f9"],"products":["invisioncommunity:invision_power_board"],"source":"nvd","synced_at":"2026-10-19T20:42:09.859288039+00:00"},"epss":{"cve":"CVE-2016-2564","score":0.01273,"percentile":0.69881,"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."]}