How severe is CVE-2019-4227?

CVE-2019-4227 has a CVSS 3.x base score of 7.3, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2019-4227 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-4227?

CVE-2019-4227 primarily affects Ibm Mq. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2019-4227?

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-2019-4227 published?

CVE-2019-4227 was published on 2019-10-04 and last updated on 2026-06-17.

CVE-2019-4227

CVE-2019-4227 is a high-severity vulnerability in Ibm Mq with a CVSS 3.x base score of 7.3. 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: High (CVSS 3.x base score 7.3)
CVSS v2: 7.5
EPSS exploit prediction: 1% (65th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-384
Affected product: Ibm Mq
Published: 2019-10-04
Last modified: 2026-06-17

Description

IBM MQ 8.0.0.4 - 8.0.0.12, 9.0.0.0 - 9.0.0.6, 9.1.0.0 - 9.1.0.2, and 9.1.0 - 9.1.2 AMQP Listeners could allow an unauthorized user to conduct a session fixation attack due to clients not being disconnected as they should. IBM X-Force ID: 159352.

Frequently asked questions

What is CVE-2019-4227?: IBM MQ 8.0.0.4 - 8.0.0.12, 9.0.0.0 - 9.0.0.6, 9.1.0.0 - 9.1.0.2, and 9.1.0 - 9.1.2 AMQP Listeners could allow an unauthorized user to conduct a session fixation attack due to clients not being disconnected as they should. IBM X-Force ID: 159352.
How severe is CVE-2019-4227?: CVE-2019-4227 has a CVSS 3.x base score of 7.3, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2019-4227 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-4227?: CVE-2019-4227 primarily affects Ibm Mq. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2019-4227?: 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-2019-4227 published?: CVE-2019-4227 was published on 2019-10-04 and last updated on 2026-06-17.

References

Affected products (3)

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

More vulnerabilities in Ibm Mq

CVE-2020-4682 — Critical (CVSS 9.8): IBM MQ 7.5, 8.0, 9.0, 9.1, 9.2 LTS, and 9.2 CD could allow a remote attacker to execute arbitrary code on the system,…
CVE-2022-22489 — Critical (CVSS 9.1): IBM MQ 8.0, (9.0, 9.1, 9.2 LTS), and (9.1 and 9.2 CD) are vulnerable to an XML External Entity Injection (XXE) attack…
CVE-2025-36128 — High (CVSS 7.5): IBM MQ 9.1, 9.2, 9.3, 9.4 LTS and 9.3, 9.4 CD is vulnerable to a denial of service, caused by improper enforcement of…
CVE-2024-31912 — High (CVSS 7.5): IBM MQ 9.3 LTS and 9.3 CD could allow an authenticated user to escalate their privileges under certain configurations…
CVE-2024-25015 — High (CVSS 7.5): IBM MQ 9.2 LTS, 9.3 LTS, and 9.3 CD Internet Pass-Thru could allow a remote user to cause a denial of service by…
CVE-2024-25016 — High (CVSS 7.5): IBM MQ and IBM MQ Appliance 9.0, 9.1, 9.2, 9.3 LTS and 9.3 CD could allow a remote unauthenticated attacker to cause a…

All CVEs affecting Ibm Mq →

Other CWE-384 (Session Fixation) vulnerabilities

CVE-2024-11317 — Critical (CVSS 10.0): Session Fixation vulnerabilities allow an attacker to fix a users session identifier before login providing an…
CVE-2024-38513 — Critical (CVSS 10.0): Fiber is an Express-inspired web framework written in Go A vulnerability present in versions prior to 2.52.5 is a…
CVE-2021-20151 — Critical (CVSS 10.0): Trendnet AC2600 TEW-827DRU version 2.08B01 contains a flaw in the session management for the device. The router's…
CVE-2025-67446 — Critical (CVSS 9.8): Improper Authentication (Authentication Bypass) exists in Neterbit NW-431F Router 20241014-IR03 and before. The router…
CVE-2026-25101 — Critical (CVSS 9.8): Bludit allows user's session identifier to be set before authentication. The value of this session ID stays the same…
CVE-2026-24352 — Critical (CVSS 9.8): PluXml CMS allows a user's session identifier to be set before authentication. The value of this session ID stays the…

Browse all CWE-384 (Session Fixation) vulnerabilities →