Umbraco CMS logout page displayed before session expiration
Impact
The Backoffice displays the logout page with a session timeout message before the server session has fully expired, causing users to believe they have been logged out approximately 30 seconds before they actually are.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| .NET (NuGet) | Umbraco.CMS | >= 13.0.0, < 13.5.2, >= 10.0.0, < 10.8.7 | 13.5.2, 10.8.7 |
| .NET (NuGet) | UmbracoCMS | >= 8.0.0, < 8.18.15 | 8.18.15 |
References
- CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N- Weakness (CWE)
CWE-613- Platform
- .NET (NuGet)
- Package
Umbraco.CMS, UmbracoCMS- Disclosed
- 22.10.2024
- Updated
- 11.10.2026 11:23
Sources and licenses
OSV / GitHub Advisory Database - GHSA-fp6q-gccw-7qqm - CC BY 4.0
Vulnerability history: UmbracoCMS
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
- 7
- First → latest
- 04.2021 01.2026
- Without a fix
- 1
- Exploited in attacks
- 0
Severity breakdown
- Medium 6
- Low 1
Disclosures per year
- 2021: 3
- 2022: 0
- 2023: 0
- 2024: 3
- 2025: 0
- 2026: 1
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Umbraco CMS logout page displayed before session expiration this entry
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