Umbraco CMS vulnerable to stored XSS

published 2017-10-12 9y ago modified 2026-06-17 4mo ago also GHSA-xj94-rgf9-cq37 , EUVD-2022-5809

cvss: 5.4; version 3.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 0.8%; EPSS 0.8% chance of exploitation in 30 days, percentile 58%
public exploits: 0; none known

Cross-site scripting (XSS) vulnerability in Umbraco CMS before 7.7.3 allows remote attackers to inject arbitrary web script or HTML via the "page name" (aka nodename) parameter during the creation of a new page, related to Umbraco.Web.UI/umbraco/dialogs/Publish.aspx.cs and Umbraco.Web/umbraco.presentation/umbraco/dialogs/notifications.aspx.cs.

Patch / fix

fixed in 1 links 2

nuget UmbracoCMS.Web 7.7.3

github.com/umbraco/Umbraco-CMS@fe2b86b commit
issues.umbraco.org/issue/U4-10497 advisory

Is CVE-2017-15279 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

Check with Fencer

Exploit prediction

0.85% chance of exploitation in the next 30 days, higher than 58% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
NVD	3.0	5.4	CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
NVD	2.0	3.5	AV:N/AC:M/Au:S/C:N/I:P/A:N
GitHub	3.0	5.4	CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Affected packages

ecosystem	package	affected	fixed in
nuget	UmbracoCMS.Web	<7.7.3	7.7.3

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation

References

github.com /umbraco/Umbraco-CMS/commit/fe2b86b681455ac975b294652064b2718d4e2ba2
web, patch, third-party-advisory
issues.umbraco.org /issue/U4-10497
web, patch, vendor-advisory
nvd.nist.gov /vuln/detail/CVE-2017-15279
advisory
github.com /umbraco/Umbraco-CMS
package

Sources

Fencer Intel 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.