#VU118095 Incorrect authorization in OpenStack Keystone - CVE-2025-65073
Published: November 5, 2025 / Updated: December 16, 2025
Vulnerability identifier: #VU118095
Vulnerability risk: Critical
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N/E:U/U:Red
CVE-ID: CVE-2025-65073
CWE-ID: CWE-863
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
OpenStack Keystone
OpenStack Keystone
Software vendor:
Openstack
Openstack
Description
The vulnerability allows a remote attacker to gain access to sensitive information.
The vulnerability exists due to incorrect authorization checks within the ec2tokens and s3tokens API endpoints. A remote non-authenticated attacker can send a valid AWS Signature (e.g., from a presigned S3 URL) and obtain Keystone authorization (ec2tokens can yield a fully scoped token; s3tokens can reveal scope accepted by some services), resulting in unauthorized access and code execution.
Deployments where /v3/ec2tokens or /v3/s3tokens are reachable by unauthenticated clients (e.g., exposed on a public API) are affected.
Remediation
Install updates from vendor's website.