CVE-2016-2564

MEDIUMNVD 5.95.9—
EchelonGraph scoreMEDIUM confidence

Score 5.9 from GitHub Security Advisory published 2022-05-13. NVD baseline CVSS 5.9; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
5.9EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 5.9Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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 v3
5.9
EG Score
5.9(medium)
EG Risk
32(Track)
EG Risk 32/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity59% × 45%
Exploitation1% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
68%
KEV
Not listed

Published

April 23, 2017

Last Modified

June 17, 2026

References (4)

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 4× in last 7d / 22× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 124 total refreshes for this CVE.

  1. 2026-08-25 13:44 UTCEPSS rescore
  2. 2026-08-23 00:13 UTCEPSS rescore
  3. 2026-08-21 23:44 UTCEPSS rescore
  4. 2026-08-19 16:59 UTCEPSS rescore
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  1. 2026-07-23 01:22 UTCEG score recompute
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  3. 2026-07-22 14:04 UTCEPSS rescore
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  22. 2026-07-09 19:05 UTCEPSS rescore
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  24. 2026-07-07 13:42 UTCEPSS rescore
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  44. 2026-06-21 14:54 UTCEPSS rescore
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  48. 2026-06-19 19:23 UTCEPSS rescore
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  50. 2026-06-18 17:50 UTCEPSS rescore
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  73. 2026-06-02 20:10 UTCEPSS rescore
  74. 2026-06-01 13:49 UTCEPSS rescore
  75. 2026-06-01 13:49 UTCEPSS rescore

Frequently asked(5)

What is CVE-2016-2564?
CVE-2016-2564 is a medium vulnerability published on April 23, 2017. 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.
When was CVE-2016-2564 disclosed?
CVE-2016-2564 was first published in the National Vulnerability Database on April 23, 2017, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2016-2564 actively exploited?
CVE-2016-2564 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 32.3% of all scored CVEs.
What is the CVSS score of CVE-2016-2564?
CVE-2016-2564 has a CVSS v3 base score of 5.9 (NVD).
How do I remediate CVE-2016-2564?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2016-2564, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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