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Status published
Medium
CVE-2023-49278
Umbraco CMS brute force exploit can be used to collect valid usernames
Vulnerability Description
Umbraco is an ASP.NET content management system (CMS). Starting in version 8.0.0 and prior to versions 8.18.10, 10.8.1, and 12.3.4, a brute force exploit can be used to collect valid usernames. Versions 8.18.10, 10.8.1, and 12.3.4 contain a patch for this issue.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
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Credits & Attribution
No credits recorded in the NVD database.
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Affected Vendor
umbraco
View all reports →Affected Software
Umbraco-CMS
Vulnerable Versions:
>= 8.0.0, < 8.18.10, >= 9.0.0-rc001, < 10.8.1, >= 11.0.0-rc1, < 12.3.4
Timeline
Official Publish:
December 12th, 2023
Last Modified:
October 8th, 2024
Added to House:
July 22nd, 2026
CVSS Vectors
V3:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
MITRE ATT&CK TTPs
T1213
Data from Information Repositories
Collection
T1005
Data from Local System
Collection
T1552
Unsecured Credentials
Credential Access
T1041
Exfiltration Over C2 Channel
Exfiltration
T1110
Brute Force
Credential Access
T1078
Valid Accounts
Persistence
T1550
Use Alternate Authentication Material
Defense Evasion
T1021
Remote Services
Lateral Movement
T1562
Impair Defenses
Defense Evasion