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CVE-2023-49273

Umbraco CMS vulnerable to Privilege Escalation using Spoofing

MEDIUM
5.4
CVSS Score
Published: December 12, 2023 at 07:05 PM UTC
Updated: June 17, 2026 at 06:35 AM UTC
1 product affected across 1 vendorUmbraco-CMS

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Severity
MEDIUM5.4
Exploit prediction
EPSS 0.4%

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, users with low privileges (Editor, etc.) are able to access some unintended endpoints. Versions 8.18.10, 10.8.1, and 12.3.4 contain a patch for this issue.

Affected

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

Umbraco-CMS· Umbraco
95%
v < 10.8.1v < 12.3.4v < 8.18.1010.0.0 ≤ v < 10.8.112.0.0 ≤ v < 12.3.48.0.0 ≤ v < 8.18.10
Affected range stops below 10.8.1, so it looks safe — our inference, not a vendor statement
Affected range stops below 12.3.4, so it looks safe — our inference, not a vendor statement
Affected range stops below 8.18.10, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

x_refsource_CONFIRMVendor Advisory
Source: [email protected]
https://github.com/umbraco/Umbraco-CMS/security/advisories/GHSA-cfr5-7p54-4qg8

CVSS

5.4MEDIUMGitHub_M
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-863

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