TI-2024-32621 Aliases CVE-2024-48926 GHSA-fp6q-gccw-7qqm

Umbraco CMS logout page displayed before session expiration

LOW 19CWE-613Published 2024-10-22 · Updated 2024-10-22

Key facts

Attack vector: Network
Privileges required: None
User interaction: Required
Attack complexity: High
Impact type: Security bypass
Confidentiality · integrity · availability: Low · Low · None
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-613.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00266 18th percentileScored 2026-11-07

Fix Fixed Umbraco-CMS (umbraco): 13.5.2, 10.8.7, 8.18.15Umbraco.CMS (NuGet): 13.5.2, 10.8.7+1 more product

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
umbraco	Umbraco-CMS	13.0.0 to before 13.5.2; 10.0.0 to before 10.8.7; 8.0.0 to before 8.18.15	13.5.2, 10.8.7, 8.18.15	Patch available	CNA
—	Umbraco.CMS (NuGet)	13.0.0 to before 13.5.2	13.5.2	Patch available	GHSA-fp6q-gccw-7qqm
—	Umbraco.CMS (NuGet)	10.0.0 to before 10.8.7	10.8.7	Patch available	GHSA-fp6q-gccw-7qqm
—	UmbracoCMS (NuGet)	8.0.0 to before 8.18.15	8.18.15	Patch available	GHSA-fp6q-gccw-7qqm

Umbraco-CMS Vendorumbraco Affected 13.0.0 to before 13.5.2; 10.0.0 to before 10.8.7; 8.0.0 to before 8.18.15 Fixed in 13.5.2, 10.8.7, 8.18.15 Patch available CNA
Umbraco.CMS (NuGet) Vendor— Affected 13.0.0 to before 13.5.2 Fixed in 13.5.2 Patch available GHSA-fp6q-gccw-7qqm
Umbraco.CMS (NuGet) Vendor— Affected 10.0.0 to before 10.8.7 Fixed in 10.8.7 Patch available GHSA-fp6q-gccw-7qqm
UmbracoCMS (NuGet) Vendor— Affected 8.0.0 to before 8.18.15 Fixed in 8.18.15 Patch available GHSA-fp6q-gccw-7qqm

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:umbraco:umbraco_cms::::::::	8.0 to before 8.18.15; 10.0 to before 10.8.7; 13.0 to before 13.5.2	Vulnerable	umbraco

cpe:2.3:a:umbraco:umbraco_cms:*:*:*:*:*:*:*:* Versions 8.0 to before 8.18.15; 10.0 to before 10.8.7; 13.0 to before 13.5.2 Vulnerable ·umbraco

Remediation

Fix · CNA Umbraco-CMS (umbraco) Fixed in 13.5.2, 10.8.7, 8.18.15
Fix · GHSA-fp6q-gccw-7qqm Umbraco.CMS (NuGet) Fixed in 13.5.2 Advisory →
Fix · GHSA-fp6q-gccw-7qqm Umbraco.CMS (NuGet) Fixed in 10.8.7 Advisory →
Fix · GHSA-fp6q-gccw-7qqm UmbracoCMS (NuGet) Fixed in 8.18.15 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2024-48926
2026-10-03 Alias added: GHSA-fp6q-gccw-7qqm

References

Advisory 2

Other 1

https://github.com/umbraco/Umbraco-CMS

TI-2025-41183 An arbitrary file upload vulnerability in Umbraco CMS v16.3.3 allows attackers to execute… CVSS 3.1CRITICAL 10.0
TI-2012-05477 Umbraco CMS < 4.7.1 codeEditorSave.asmx RCE CVSS 4.0CRITICAL 9.3
TI-2021-22392 Umbraco v8.14.1 - 'baseUrl' SSRF CVSS 4.0MEDIUM 6.9
TI-2024-36846 A stored cross-site scripting (XSS) vulnerability in Umbraco CMS v14.3.1 allows attackers… CVSS 3.1MEDIUM 6.5
TI-2019-15240 Umbraco CMS 4.11.8 through 7.15.10, and 7.12.4, allows Remote Code Execution by… CVSS 3.1HIGH 7.2
TI-2020-04738 Cross-site scripting in Umbraco CMS CVSS 3.1MEDIUM 5.4

See all 56 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences