CVE-2016-2564

medium

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.

References

https://medium.com/%40iancarroll/bypassing-authentication-in-invision-power-board-with-cve-2016-2564-9a24ea3655f9

https://invisionpower.com/release-notes/419-r37/

Details

Source: Mitre, NVD

Published: 2017-04-23

Updated: 2026-05-13

Risk Information

CVSS v2

Base Score: 4.3

Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:N/A:N

Severity: Medium

CVSS v3

Base Score: 5.9

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Severity: Medium

EPSS

EPSS: 0.00089