How severe is CVE-2015-4594?

CVE-2015-4594 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2015-4594 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (93rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-4594?

CVE-2015-4594 affects Eclinicalworks Population Health. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2015-4594?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2015-4594 published?

CVE-2015-4594 was published on 2017-01-10 and last updated on 2026-06-17.

CVE-2015-4594

CVE-2015-4594 is a critical-severity vulnerability in Eclinicalworks Population Health with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-284.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 6% (93rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-284
Affected product: Eclinicalworks Population Health
Published: 2017-01-10
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2015-4594?: 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 severe is CVE-2015-4594?: CVE-2015-4594 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2015-4594 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (93rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2015-4594?: CVE-2015-4594 affects Eclinicalworks Population Health. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2015-4594?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2015-4594 published?: CVE-2015-4594 was published on 2017-01-10 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:eclinicalworks:population_health:-:*:*:*:*:*:*:*

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