How severe is CVE-2019-4304?

CVE-2019-4304 has a CVSS 3.x base score of 6.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2019-4304 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-4304?

CVE-2019-4304 affects Ibm Websphere Application Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-4304?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2019-4304 published?

CVE-2019-4304 was published on 2019-09-30 and last updated on 2026-06-17.

CVE-2019-4304

CVE-2019-4304 is a medium-severity vulnerability in Ibm Websphere Application Server with a CVSS 3.x base score of 6.3. 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-384.

Key facts

Severity: Medium (CVSS 3.x base score 6.3)
CVSS v2: 6.5
EPSS exploit prediction: 1% (59th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-384
Affected product: Ibm Websphere Application Server
Published: 2019-09-30
Last modified: 2026-06-17

Description

IBM WebSphere Application Server - Liberty could allow a remote attacker to bypass security restrictions caused by improper session validation. IBM X-Force ID: 160950.

Frequently asked questions

What is CVE-2019-4304?: IBM WebSphere Application Server - Liberty could allow a remote attacker to bypass security restrictions caused by improper session validation. IBM X-Force ID: 160950.
How severe is CVE-2019-4304?: CVE-2019-4304 has a CVSS 3.x base score of 6.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2019-4304 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-4304?: CVE-2019-4304 affects Ibm Websphere Application Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-4304?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2019-4304 published?: CVE-2019-4304 was published on 2019-09-30 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:ibm:websphere_application_server:*:*:*:*:liberty:*:*:*

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