CVE-2021-23365

Authentication Bypass

CRITICAL
9.1
CVSS Score
Published: April 26, 2021 at 10:05 AM UTC
Updated: June 17, 2026 at 03:38 AM UTC
1 product affected across 1 vendorTyk Identity Broker

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Severity
CRITICAL9.1
Exploit prediction
EPSS 1%

Description

The package github.com/tyktechnologies/tyk-identity-broker before 1.1.1 are vulnerable to Authentication Bypass via the Go XML parser which can cause SAML authentication bypass. This is because the XML parser doesn’t guarantee integrity in the XML round-trip (encoding/decoding XML data).

Affected

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

v < 1.1.1
Affected range stops below 1.1.1, so it looks safe — our inference, not a vendor statement

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-287

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