CVE-2023-0456: Apicast proxies the api call with incorrect jwt token to the api backend without proper authorization check

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2023-09-27 · updated 2026-06-17
Weakness: CWE-285

Description

A flaw was found in APICast, when 3Scale's OIDC module does not properly evaluate the response to a mismatched token from a separate realm. This could allow a separate realm to be accessible to an attacker, permitting access to unauthorized information.

Affected products

apicast: before 2.12.2; from 2.13.0 before 2.13.2 — fixed in 2.12.2, 2.13.2

How to fix

Upgrade to a fixed version: apicast 2.12.2, 2.13.2. Check the vendor advisory for mitigations.

References

https://access.redhat.com/security/cve/CVE-2023-0456
https://bugzilla.redhat.com/show_bug.cgi?id=2163586
https://access.redhat.com/security/cve/CVE-2023-0456
https://bugzilla.redhat.com/show_bug.cgi?id=2163586

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