CVE-2020-5425 json
User Impersonation possible in Tanzu SSO
published 2020-10-31 6 y ago modified 2026-06-17 4 mo ago also EUVD-2020-26593
- cvss
- 7.5
- version 3.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.7%
- EPSS 0.7% chance of exploitation in 30 days, percentile 54%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- VMware Tanzu Single Sign-On for VMware Tanzu 1.11.3, 1.12.4, 1.13.1
Exploit prediction
0.73% chance of exploitation in the next 30 days, higher than 54% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.0 | 7.5 | CVSS:3.0/AV:N/AC:H/PR:H/UI:R/S:C/C:L/I:H/A:H |
| NVD | 3.1 | 7.9 | CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:H/A:H |
| NVD | 2.0 | 4.6 | AV:N/AC:H/Au:S/C:P/I:P/A:P |
Affected products
- VMware Tanzu Single Sign-On for VMware Tanzu
Classification
- Weakness
-
- CWE-287 Improper Authentication
References
-
tanzu.vmware.com
/security/cve-2020-5425
vendor-advisory
Sources
- CVE List CVE-2020-5425
- NVD CVE-2020-5425
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