CVE-2025-0693

Issue with AWS Sign-in IAM User Login Flow - Possible Username Enumeration

Published Jan 23, 2025 CVSS 4.0 · 6.9 Medium EPSS < 1% KEV · Not listed
Description
Variable response times in the AWS Sign-in IAM user login flow allowed for the use of brute force enumeration techniques to identify valid IAM usernames in an arbitrary AWS account.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2025-1817 Variable response times in the AWS Sign-in IAM user login flow allowed for the use of brute force enumeration techniques to identify valid IAM usernames in an arbitrary AWS account.
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description Variable response times in the AWS Sign-in IAM user login flow allowed for the use of brute force enumeration techniques to identify valid IAM usernames in an arbitrary AWS account.
Title Issue with AWS Sign-in IAM User Login Flow - Possible Username Enumeration
Weaknesses CWE-204
CWE-208
References
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N'}

cvssV4_0

{'score': 6.9, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N'}

Subscriptions

No data.

Weaknesses

Sources

Status
PUBLISHED
Assigner
AMZN
Published
Updated
Oct 14, 2025, 6:42 PM
Reserved
Jan 23, 2025, 8:36 PM
Status
Deferred
Published
Jan 23, 2025, 10:15 PM
Modified
Jun 17, 2026, 8:26 AM