How severe is CVE-2020-4555?

CVE-2020-4555 has a CVSS 3.x base score of 5.4, 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 low, and availability none.

Is CVE-2020-4555 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-4555?

CVE-2020-4555 primarily affects Ibm Financial Transaction Manager. In total, 13 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-4555?

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

When was CVE-2020-4555 published?

CVE-2020-4555 was published on 2020-12-21 and last updated on 2026-06-17.

CVE-2020-4555

CVE-2020-4555 is a medium-severity vulnerability in Ibm Financial Transaction Manager with a CVSS 3.x base score of 5.4. 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: Medium (CVSS 3.x base score 5.4)
CVSS v2: 5.5
EPSS exploit prediction: 1% (51st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-384
Affected product: Ibm Financial Transaction Manager
Published: 2020-12-21
Last modified: 2026-06-17

Description

IBM Financial Transaction Manager 3.0.6 and 3.1.0 does not invalidate session after logout which could allow an authenticated user to impersonate another user on the system. IBM X-Force ID: 183328.

Frequently asked questions

What is CVE-2020-4555?: IBM Financial Transaction Manager 3.0.6 and 3.1.0 does not invalidate session after logout which could allow an authenticated user to impersonate another user on the system. IBM X-Force ID: 183328.
How severe is CVE-2020-4555?: CVE-2020-4555 has a CVSS 3.x base score of 5.4, 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 low, and availability none.
Is CVE-2020-4555 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-4555?: CVE-2020-4555 primarily affects Ibm Financial Transaction Manager. In total, 13 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-4555?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-4555 published?: CVE-2020-4555 was published on 2020-12-21 and last updated on 2026-06-17.

References

Affected products (13)

cpe:2.3:a:ibm:financial_transaction_manager:2.1.1.0:*:*:*:*:cps_services:*:*
cpe:2.3:a:ibm:financial_transaction_manager:3.0.0:*:*:*:*:check_services:*:*
cpe:2.3:a:ibm:financial_transaction_manager:3.0.2:*:*:*:*:check_services:*:*
cpe:2.3:a:ibm:financial_transaction_manager:3.0.2:*:*:*:*:cps_services:*:*
cpe:2.3:a:ibm:financial_transaction_manager:3.0.5:*:*:*:*:check_services:*:*
cpe:2.3:a:ibm:financial_transaction_manager:3.0.6:*:*:*:*:ach_services:*:*
cpe:2.3:a:ibm:financial_transaction_manager:3.1.0:*:*:*:*:ach_services:*:*
cpe:2.3:a:ibm:financial_transaction_manager:3.2.1:*:*:*:*:cps_services:*:*
cpe:2.3:a:ibm:financial_transaction_manager:3.2.2:*:*:*:*:digital_payments:*:*
cpe:2.3:a:ibm:financial_transaction_manager:3.2.3:*:*:*:*:digital_payments:*:*
cpe:2.3:a:ibm:financial_transaction_manager:3.2.4:*:*:*:*:cps_services:*:*
cpe:2.3:a:ibm:financial_transaction_manager:3.2.4:*:*:*:*:digital_payments:*:*
cpe:2.3:a:ibm:financial_transaction_manager:3.2.4:*:*:*:*:high_value:*:*

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