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CVE-2021-20278

MEDIUM
6.5
CVSS Score
Published: May 28, 2021 at 10:42 AM UTC
Updated: June 17, 2026 at 03:33 AM UTC
1 product affected across 1 vendor[Kiali]

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Severity
MEDIUM6.5
Exploit prediction
EPSS 0.8%

Description

An authentication bypass vulnerability was found in Kiali in versions before 1.31.0 when the authentication strategy `OpenID` is used. When RBAC is enabled, Kiali assumes that some of the token validation is handled by the underlying cluster. When OpenID `implicit flow` is used with RBAC turned off, this token validation doesn't occur, and this allows a malicious user to bypass the authentication.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

[Kiali]· Kiali
95%
v < 1.31.01.31.0
Affected range stops below 1.31.0, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

x_refsource_MISCIssue TrackingPatchThird Party Advisory
Source: [email protected]
https://bugzilla.redhat.com/show_bug.cgi?id=1937171
x_refsource_MISCVendor Advisory
Source: [email protected]
https://kiali.io/news/security-bulletins/kiali-security-002/

CVSS

6.5MEDIUM[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-290CWE-287

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