How severe is CVE-2021-20423?

CVE-2021-20423 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-2021-20423 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (61st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-20423?

CVE-2021-20423 affects Ibm Cloud Pak For Applications. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-20423?

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-2021-20423 published?

CVE-2021-20423 was published on 2021-07-13 and last updated on 2026-06-17.

CVE-2021-20423

CVE-2021-20423 is a high-severity vulnerability in Ibm Cloud Pak For Applications 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. The underlying weakness is classified as CWE-732.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 6.5
EPSS exploit prediction: 1% (61st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-732
Affected product: Ibm Cloud Pak For Applications
Published: 2021-07-13
Last modified: 2026-06-17

Description

IBM Cloud Pak for Applications 4.3 could allow an authenticated user gain escalated privilesges due to improper application permissions. IBM X-Force ID: 196308.

Frequently asked questions

What is CVE-2021-20423?: IBM Cloud Pak for Applications 4.3 could allow an authenticated user gain escalated privilesges due to improper application permissions. IBM X-Force ID: 196308.
How severe is CVE-2021-20423?: CVE-2021-20423 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-2021-20423 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (61st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-20423?: CVE-2021-20423 affects Ibm Cloud Pak For Applications. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-20423?: 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-2021-20423 published?: CVE-2021-20423 was published on 2021-07-13 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:ibm:cloud_pak_for_applications:*:*:*:*:*:*:*:*

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