How severe is CVE-2019-4155?

CVE-2019-4155 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2019-4155 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-4155?

CVE-2019-4155 affects Ibm Api Connect. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-4155?

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

When was CVE-2019-4155 published?

CVE-2019-4155 was published on 2019-04-08 and last updated on 2026-06-17.

CVE-2019-4155

CVE-2019-4155 is a high-severity vulnerability in Ibm Api Connect with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 7.5
EPSS exploit prediction: 3% (84th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Ibm Api Connect
Published: 2019-04-08
Last modified: 2026-06-17

Description

IBM API Connect's Developer Portal 2018.1 and 2018.4.1.3 is impacted by a privilege escalation vulnerability when integrated with an OpenID Connect (OIDC) user registry. IBM X-Force ID: 158544.

Frequently asked questions

What is CVE-2019-4155?: IBM API Connect's Developer Portal 2018.1 and 2018.4.1.3 is impacted by a privilege escalation vulnerability when integrated with an OpenID Connect (OIDC) user registry. IBM X-Force ID: 158544.
How severe is CVE-2019-4155?: CVE-2019-4155 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2019-4155 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-4155?: CVE-2019-4155 affects Ibm Api Connect. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-4155?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2019-4155 published?: CVE-2019-4155 was published on 2019-04-08 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:ibm:api_connect:*:*:*:*:*:*:*:*

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