Umbraco CMS Has Incomplete Server Termination During Explicit Sign-Out

published 2024-10-22 2 y ago modified 2026-06-17 4 mo ago also EUVD-2024-3159 , GHSA-wxw9-6pv9-c3xc

cvss: 4.2; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.3%; EPSS 0.3% chance of exploitation in 30 days, percentile 19%
public exploits: 0; none known

Umbraco is a free and open source .NET content management system. In versions on the 13.x branch prior to 13.5.2 and versions on the 10.x branch prior to 10.8.7, during an explicit sign-out, the server session is not fully terminated. Versions 13.5.2 and 10.8.7 contain a patch for the issue.

Patch / fix

fixed in 2

nuget Umbraco.CMS 10.8.7, 13.5.2
umbraco umbraco_cms 10.8.7, 13.5.2

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 2 y ago (2024-10-22)

Exploit prediction

0.27% chance of exploitation in the next 30 days, higher than 19% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	4.2	CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N
GitHub	3.1	4.2	CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N
NVD	3.1	4.2	CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N

Affected packages

ecosystem	package	affected	fixed in
nuget	Umbraco.CMS	>=13.0.0, <13.5.2 >=10.0.0, <10.8.7	13.5.2 10.8.7

Affected products

umbraco Umbraco-CMS

Classification

Weakness

CWE-384 Session Fixation

References

github.com /umbraco/Umbraco-CMS/security/advisories/GHSA-wxw9-6pv9-c3xc
web, vendor-advisory
nvd.nist.gov /vuln/detail/CVE-2024-48929
advisory
github.com /umbraco/Umbraco-CMS
package

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.

Summary