CVE-2023-49274 json
Umbraco CMS SMTP misconfiguration exposes potential registered user email
published 2023-12-12 2 y ago modified 2026-06-17 4 mo ago also GHSA-8qp8-9rpw-j46c , EUVD-2023-3163
- cvss
- 3.7
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.5%
- EPSS 0.5% chance of exploitation in 30 days, percentile 40%
- 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, a user enumeration attack is possible when SMTP is not set up correctly, but reset password is enabled. 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
0.46% chance of exploitation in the next 30 days, higher than 40% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 3.7 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N |
| NVD | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
| GitHub | 3.1 | 3.7 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/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-200 Exposure of Sensitive Information to an Unauthorized Actor
References
-
github.com
/umbraco/Umbraco-CMS/security/advisories/GHSA-8qp8-9rpw-j46c
web, vendor-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2023-49274
advisory
-
github.com
/umbraco/Umbraco-CMS
package
Sources
- CVE List CVE-2023-49274
- GitHub Advisory GHSA-8qp8-9rpw-j46c
- NVD CVE-2023-49274
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