CVE-2023-49273 json
Umbraco CMS vulnerable to Privilege Escalation using Spoofing
published 2023-12-12 2 y ago modified 2026-06-17 4 mo ago also GHSA-cfr5-7p54-4qg8 , EUVD-2023-3183
- cvss
- 5.4
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 30%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- nuget Umbraco.CMS 8.18.10, 10.8.1, 12.3.4
- umbraco umbraco_cms 8.18.10, 10.8.1, 12.3.4
Exploit prediction
0.37% chance of exploitation in the next 30 days, higher than 30% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 5.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N |
| NVD | 3.1 | 5.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N |
| GitHub | 3.1 | 5.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| nuget | Umbraco.CMS | >=8.0.0, <8.18.10 >=9.0.0, <10.8.1 >=11.0.0, <12.3.4 |
8.18.10 10.8.1 12.3.4 |
Affected products
- umbraco Umbraco-CMS
Classification
- Weakness
-
- CWE-863 Incorrect Authorization
References
-
github.com
/umbraco/Umbraco-CMS/security/advisories/GHSA-cfr5-7p54-4qg8
web, vendor-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2023-49273
advisory
-
github.com
/umbraco/Umbraco-CMS
package
Sources
- CVE List CVE-2023-49273
- GitHub Advisory GHSA-cfr5-7p54-4qg8
- NVD CVE-2023-49273
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