How severe is CVE-2020-4319?

CVE-2020-4319 has a CVSS 3.x base score of 4.3, 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 none, and availability none.

Is CVE-2020-4319 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-4319?

CVE-2020-4319 primarily affects Ibm Mq Appliance. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-4319?

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

When was CVE-2020-4319 published?

CVE-2020-4319 was published on 2020-07-28 and last updated on 2026-06-17.

CVE-2020-4319

CVE-2020-4319 is a medium-severity vulnerability in Ibm Mq Appliance with a CVSS 3.x base score of 4.3. 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-209.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
CVSS v2: 3.5
EPSS exploit prediction: 1% (50th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-209
Affected product: Ibm Mq Appliance
Published: 2020-07-28
Last modified: 2026-06-17

Description

IBM MQ, IBM MQ Appliance, and IBM MQ for HPE NonStop 8.0, 9.1 LTS, and 9.1 CD could allow under special circumstances, an authenticated user to obtain sensitive information due to a data leak from an error message within the pre-v7 pubsub logic. IBM X-Force ID: 177402.

Frequently asked questions

What is CVE-2020-4319?: IBM MQ, IBM MQ Appliance, and IBM MQ for HPE NonStop 8.0, 9.1 LTS, and 9.1 CD could allow under special circumstances, an authenticated user to obtain sensitive information due to a data leak from an error message within the pre-v7 pubsub logic. IBM X-Force ID: 177402.
How severe is CVE-2020-4319?: CVE-2020-4319 has a CVSS 3.x base score of 4.3, 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 none, and availability none.
Is CVE-2020-4319 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-4319?: CVE-2020-4319 primarily affects Ibm Mq Appliance. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-4319?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-4319 published?: CVE-2020-4319 was published on 2020-07-28 and last updated on 2026-06-17.

References

Affected products (3)

cpe:2.3:a:ibm:mq_appliance:*:*:*:*:*:*:*:*
cpe:2.3:a:ibm:mq_appliance:*:*:*:*:lts:*:*:*
cpe:2.3:a:ibm:mq_appliance:*:*:*:*:continuous_delivery:*:*:*

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