How severe is CVE-2020-5425?

CVE-2020-5425 has a CVSS 3.x base score of 7.9, rated high severity. It is exploitable over network with high attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity high, and availability high.

Is CVE-2020-5425 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-5425?

CVE-2020-5425 affects Vmware Single Sign-on For Tanzu. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-5425?

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-2020-5425 published?

CVE-2020-5425 was published on 2020-10-31 and last updated on 2026-06-17.

CVE-2020-5425

CVE-2020-5425 is a high-severity vulnerability in Vmware Single Sign-on For Tanzu with a CVSS 3.x base score of 7.9. 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-287.

Key facts

Severity: High (CVSS 3.x base score 7.9)
CVSS v2: 4.6
EPSS exploit prediction: 1% (53rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-287
Affected product: Vmware Single Sign-on For Tanzu
Published: 2020-10-31
Last modified: 2026-06-17

Description

Single Sign-On for Vmware Tanzu all versions prior to 1.11.3 ,1.12.x versions prior to 1.12.4 and 1.13.x prior to 1.13.1 are vulnerable to user impersonation attack.If two users are logged in to the SSO operator dashboard at the same time, with the same username, from two different identity providers, one can acquire the token of the other and thus operate with their permissions. Note: Foundation may be vulnerable only if: 1) The system zone is set up to use a SAML identity provider 2) There are internal users that have the same username as users in the external SAML provider 3) Those duplicate-named users have the scope to access the SSO operator dashboard 4) The vulnerability doesn't appear with LDAP because of chained authentication.

Frequently asked questions

What is CVE-2020-5425?: Single Sign-On for Vmware Tanzu all versions prior to 1.11.3 ,1.12.x versions prior to 1.12.4 and 1.13.x prior to 1.13.1 are vulnerable to user impersonation attack.If two users are logged in to the SSO operator dashboard at the same time, with the same username, from two different identity providers, one can acquire the token of the other and thus operate with their permissions. Note: Foundation may be vulnerable only if: 1) The system zone is set up to use a SAML identity provider 2) There are internal users that have the same username as users in the external SAML provider 3) Those duplicate-named users have the scope to access the SSO operator dashboard 4) The vulnerability doesn't appear with LDAP because of chained authentication.
How severe is CVE-2020-5425?: CVE-2020-5425 has a CVSS 3.x base score of 7.9, rated high severity. It is exploitable over network with high attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity high, and availability high.
Is CVE-2020-5425 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-5425?: CVE-2020-5425 affects Vmware Single Sign-on For Tanzu. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-5425?: 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-2020-5425 published?: CVE-2020-5425 was published on 2020-10-31 and last updated on 2026-06-17.

References

https://tanzu.vmware.com/security/cve-2020-5425

Affected products (1)

cpe:2.3:a:vmware:single_sign-on_for_tanzu:*:*:*:*:*:*:*:*

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