CVE-2024-48926
Umbraco CMS logout page displayed before session expiration
Umbraco, a free and open source .NET content management system, has an insufficient session expiration issue in versions on the 13.x branch prior to 13.5.2, 10.x prior to 10.8.7, and 8.x prior to 8.18.15. 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. Versions 13.5.2, 10.8,7, and 8.18.15 contain a patch for the issue.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
Umbraco CMS logout page displayed before session expiration
Umbraco, a free and open source .NET content management system, has an insufficient session expiration issue in versions on the 13.x branch prior to 13.5.2, 10.x prior to 10.8.7, and 8.x prior to 8.18.15. 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. Versions 13.5.2, 10.8,7, and 8.18.15 contain a patch for the issue.
- Record
CVE-2024-48926- CVSS 3.1
- 4.2 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N - Weakness
- CWE-613
- Updated
- 2026-11-02
EUVDEUVD-2024-3039
Umbraco, a free and open source .NET content management system, has an insufficient session expiration issue in versions on the 13.x branch prior to 13.5.2, 10.x prior to 10.8.7, and 8.x prior to 8.18.15. 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. Versions 13.5.2, 10.8,7, and 8.18.15 contain a patch for the issue.
- Record
EUVD-2024-3039- CVSS 3.1
- 4.2 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-fp6q-gccw-7qqm
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.
- Record
GHSA-fp6q-gccw-7qqm- CVSS 3.1
- 4.2 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N - Weakness
- CWE-613
- Updated
- 2026-11-02
NVD
Umbraco, a free and open source .NET content management system, has an insufficient session expiration issue in versions on the 13.x branch prior to 13.5.2, 10.x prior to 10.8.7, and 8.x prior to 8.18.15. 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. Versions 13.5.2, 10.8,7, and 8.18.15 contain a patch for the issue.
- Record
CVE-2024-48926- CVSS 3.1
- 4.2 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N - CVSS 3.1
- 3.1 Low
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N - Weakness
- CWE-613
- Updated
- 2026-11-02
OSV
Umbraco CMS logout page displayed before session expiration
Umbraco, a free and open source .NET content management system, has an insufficient session expiration issue in versions on the 13.x branch prior to 13.5.2, 10.x prior to 10.8.7, and 8.x prior to 8.18.15. 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. Versions 13.5.2, 10.8,7, and 8.18.15 contain a patch for the issue.
- Record
CVE-2024-48926- CVSS 3.1
- 4.2 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N - Weakness
- CWE-613
- Updated
- 2026-11-02
OSVGHSA-fp6q-gccw-7qqm
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.
- Record
GHSA-fp6q-gccw-7qqm- CVSS 3.1
- 4.2 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N - Weakness
- CWE-613
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
Umbraco.CMSNuGet |
13.0.0 up to 13.5.2 | 13.5.2 |
Umbraco.CMSNuGet |
10.0.0 up to 10.8.7 | 10.8.7 |
UmbracoCMSNuGet |
8.0.0 up to 8.18.15 | 8.18.15 |
Umbraco.CMSNuGet |
13.0.0 up to 13.5.2, plus listed versions 13.0.113.0.213.0.313.1.013.1.0-rc Show 16 moreShow less13.1.113.2.013.2.0-rc13.2.113.2.213.3.013.3.0-rc13.3.113.3.213.4.013.4.0-rc13.4.0-rc213.4.113.5.013.5.0-rc13.5.1 |
13.5.2 |
Umbraco.CMSNuGet |
10.0.0 up to 10.8.7, plus listed versions 10.0.110.1.010.1.0-rc10.1.0-rc210.1.1 Show 27 moreShow less10.2.010.2.0-rc10.2.110.3.010.3.0-rc10.3.110.3.210.4.010.4.0-rc10.4.110.4.210.5.010.5.0-rc10.5.110.6.010.6.0-rc10.6.110.7.010.7.0-rc10.8.010.8.0-rc10.8.110.8.210.8.310.8.410.8.510.8.6 |
10.8.7 |
UmbracoCMSNuGet |
8.0.0 up to 8.18.15, plus listed versions 8.0.18.0.28.0.38.1.08.1.1 Show 45 moreShow less8.1.28.1.38.1.48.1.58.1.68.10.08.10.0-rc8.10.18.10.28.10.38.11.08.11.0-rc8.11.18.11.28.11.38.12.08.12.0-rc8.12.18.12.28.12.38.13.08.13.0-rc8.13.18.14.08.14.0-rc8.14.18.14.28.14.38.14.48.15.08.15.0-rc8.15.18.15.28.15.38.16.08.16.0-rc8.17.08.17.0-rc8.17.0-rc28.17.18.17.28.18.08.18.0-rc8.18.0-rc28.18.1 |
8.18.15 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases, published | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2024-48926 is a medium vulnerability (CVSS 4.2) in Umbraco Cms, published October 22, 2024. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.27%, the 18th percentile. Fixed in Umbraco.CMS 13.5.2.
References
Left out here: 56 versions. The JSON record has them.