How severe is CVE-2019-4203?

CVE-2019-4203 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-2019-4203 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-4203?

CVE-2019-4203 affects Ibm Api Connect. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-4203?

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-2019-4203 published?

CVE-2019-4203 was published on 2019-04-15 and last updated on 2026-06-17.

CVE-2019-4203

CVE-2019-4203 is a critical-severity vulnerability in Ibm Api Connect 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-918.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 9.0
EPSS exploit prediction: 2% (76th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-918
Affected product: Ibm Api Connect
Published: 2019-04-15
Last modified: 2026-06-17

Description

IBM API Connect 5.0.0.0 and 5.0.8.6 Developer Portal can be exploited by app developers to download arbitrary files from the host OS and potentially carry out SSRF attacks. IBM X-Force ID: 159124.

Frequently asked questions

What is CVE-2019-4203?: IBM API Connect 5.0.0.0 and 5.0.8.6 Developer Portal can be exploited by app developers to download arbitrary files from the host OS and potentially carry out SSRF attacks. IBM X-Force ID: 159124.
How severe is CVE-2019-4203?: CVE-2019-4203 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-2019-4203 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-4203?: CVE-2019-4203 affects Ibm Api Connect. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-4203?: 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-2019-4203 published?: CVE-2019-4203 was published on 2019-04-15 and last updated on 2026-06-17.

References

Affected products (1)

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

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