HOMEVULNERABILITIESCVE-2016-2564
MEDIUM

CVE-2016-2564

CWE-331Published: April 23, 2017· Updated: Jun 17, 2026

5.9
CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2016-2564 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), with a CVSS base score of 5.9.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityHigh
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityNone
AvailabilityNone
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected Vendors & Products

invisioncommunity1 product(s)
invision power board
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

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

All References (4)

→
https://invisionpower.com/release-notes/419-r37/Release Notes · Vendor Advisory
→
https://medium.com/%40iancarroll/bypassing-authentication-in-invision-power-board-with-cve-2016-2564-9a24ea3655f9
→
https://invisionpower.com/release-notes/419-r37/Release Notes · Vendor Advisory
→
https://medium.com/%40iancarroll/bypassing-authentication-in-invision-power-board-with-cve-2016-2564-9a24ea3655f9

Quick Facts

CVE IDCVE-2016-2564
CVSS Score5.9 / 10
SeverityMEDIUM
WeaknessCWE-331
CISA KEVNo
Affected1 vendor(s)
PublishedApr 23, 2017

Related CVEs (CWE-331)

CVE-2023-49599
9.8
CVE-2022-34294
9.8
CVE-2022-43755
9.8
CVE-2021-41615
9.8
CVE-2018-1000620
9.8
CVE-2024-25730
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2016-2564 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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