CVE-2018-17256 json
Umbraco CMS vulnerable to stored XSS
published 2018-11-27 7 y ago modified 2026-06-17 4 mo ago also GHSA-wrrj-r2j4-969w , EUVD-2022-5635
- cvss
- 4.8
- version 3.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.7%
- EPSS 0.7% chance of exploitation in 30 days, percentile 51%
- public exploits
- 0
- none known
Summary
Persistent cross-site scripting (XSS) vulnerability in Umbraco CMS 7.12.3 allows authenticated users to inject arbitrary web script via the Header Name of a content (Blog, Content Page, etc.). The vulnerability is exploited when updating or removing public access of a content.
Exploit prediction
0.65% chance of exploitation in the next 30 days, higher than 51% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.0 | 4.8 | CVSS:3.0/AV:N/AC:L/PR:H/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 | 4.8 | CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| nuget | umbraco | <=7.12.3 |
no fix listed |
Affected products
- CyberSecurity Philippines - CERT UmbracoCMS
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
-
cspcert.ph
/advisories/2018/CVE-2018-17256.html
third-party-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2018-17256
advisory
-
github.com
/umbraco/Umbraco-CMS
package
Sources
- CVE List CVE-2018-17256
- GitHub Advisory GHSA-wrrj-r2j4-969w
- NVD CVE-2018-17256
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.