What’s Vulnerable › Vulnerabilities

CVE-2016-2564

• Severity: medium (CVSS 5.9 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2017-04-23 · updated 2026-06-17
• Weakness: CWE-331

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.

Affected products

• Kaspersky Lab Invision Power Board: through 4.1.8.1

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

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