Possible injection of HTML into user invite mails
Impact
A user with access to a specific part of the backoffice is able to inject HTML code into a form where it is not intended.
Explanation of the vulnerability
A person with access to the backoffice and the "users" section could send a user invite and inject HTML code into the invite message.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| .NET (NuGet) | Umbraco.CMS | >= 8.0.0, < 8.18.10, >= 9.0.0, < 10.7.0, >= 11.0.0, < 12.1.0 | 8.18.10, 10.7.0, 12.1.0 |
References
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:N/A:N- Weakness (CWE)
CWE-79- Platform
- .NET (NuGet)
- Package
Umbraco.CMS- Disclosed
- 13.12.2023
- Updated
- 11.10.2026 11:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-xxc6-35r7-796w - CC BY 4.0
Vulnerability history: Umbraco.CMS
All published vulnerabilities of this package (.NET (NuGet)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 29
- First → latest
- 05.2022 09.2026
- Without a fix
- 1
- Exploited in attacks
- 0
Severity breakdown
- High 5
- Medium 17
- Low 7
Disclosures per year
- 2022: 2
- 2023: 8
- 2024: 5
- 2025: 8
- 2026: 6
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Possible injection of HTML into user invite mails this entry
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