Umbraco contains a DOM-XSS

published 2023-12-12 2 y ago modified 2026-09-10 1 mo ago also GHSA-v98m-398x-269r , EUVD-2023-3302

cvss: 4.3; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.4%; EPSS 0.4% chance of exploitation in 30 days, percentile 37%
public exploits: 0; none known

Umbraco is an ASP.NET content management system (CMS). Starting in 10.0.0 and prior to versions 10.8.1 and 12.3.4, Umbraco contains a cross-site scripting (XSS) vulnerability enabling attackers to bring malicious content into a website or application. Versions 10.8.1 and 12.3.4 contain a patch for this issue.

Patch / fix

fixed in 2

nuget Umbraco.CMS 10.8.1, 12.3.4
umbraco umbraco_cms 10.8.1, 12.3.4

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 2 y ago (2024-08-28)

Exploit prediction

0.43% chance of exploitation in the next 30 days, higher than 37% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	4.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
NVD	3.1	6.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
GitHub	3.1	4.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

Affected packages

ecosystem	package	affected	fixed in
nuget	Umbraco.CMS	>=10.0.0, <10.8.1 >=11.0.0, <12.3.4	10.8.1 12.3.4

Affected products

umbraco Umbraco-CMS

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation

References

github.com /umbraco/Umbraco-CMS/security/advisories/GHSA-v98m-398x-269r
web, vendor-advisory
nvd.nist.gov /vuln/detail/CVE-2023-48313
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.

Summary