CVE-2015-4594: eClinicalWorks Population Health (CCMR) suffers from a session fixation vulnerability

This week

CRITICAL 9.8REMOTEMITIGATE

CVE-2015-4594 is a critical-severity flaw (CVSS 9.8) affecting population health. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

eClinicalWorks Population Health (CCMR) suffers from a session fixation vulnerability. When authenticating a user, the application does not assign a new session ID, making it possible to use an existent session ID.

Why this priority

Critical severity
EPSS top 6%: very likely to be exploited
Public exploit reference
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	6.2% (top 6%)
CISA exploited list	No
Weakness	CWE-284, CWE-384
Published	2017-01-10
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: eclinicalworks

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2017-01-10 15:59 UTCPublished CVE record published
2026-06-17 00:27 UTCUpdated Record last modified

eclinicalworks population health MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy population-health || rpm -q population-health || population-health --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: eClinicalWorks (CCMR) - Multiple Vulnerabilities

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2015-4594?

population health: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2015-4594 being exploited?

CVE-2015-4594 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2015-4594 affect?

CVE-2015-4594 affects population health. Severity is critical (CVSS 9.8). eClinicalWorks Population Health (CCMR) suffers from a session fixation vulnerability. When authenticating a user, the application does not assign a new session ID, making it possible to use an existent session ID.

How urgent is CVE-2015-4594?

Priority 68/100. Critical severity; EPSS top 6%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2015-4593 HIGH 8.8 MITIGATE eClinicalWorks Population Health (CCMR) suffers from a cross-site request forgery (CSRF) vulnerability in port
CVE-2015-4592 HIGH 8.8 MITIGATE eClinicalWorks Population Health (CCMR) suffers from an SQL injection vulnerability in portalUserService.jsp w
CVE-2015-4591 MEDIUM 6.1 MITIGATE eClinicalWorks Population Health (CCMR) suffers from a cross site scripting vulnerability in login.jsp which a

References

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