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.
CVE-2018-17256
MEDIUMNVD 4.84.8—
EchelonGraph scoreMEDIUM confidence
Score 4.8 from GitHub Security Advisory published 2022-05-14. NVD baseline CVSS 4.8; sources differ by 0.0.
Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
4.8
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
- Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 1%CVSS: 4.8Exploit: NoneExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 4.8
- EG Score
- 4.8(medium)
- EPSS
- 46.7%
- KEV
- Not listed
Published
November 27, 2018
Last Modified
November 21, 2024
References (2)
- vulnerability@cspcerthttps://www.cspcert.ph/advisories/2018/CVE-2018-17256.html
- af854a3a-2127-422b-91ae-364da2661108https://www.cspcert.ph/advisories/2018/CVE-2018-17256.html
Patch Availability(1)
| Vendor / Ecosystem | Fixed in / Patch | Released | Source |
|---|---|---|---|
| nuget | umbraco | — | ghsa |
Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.
Affected Packages
(1 across 1 ecosystem)
NuGet(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| umbraco | 5.0.1000 ... 5.2.0-beta (7 versions) | — | — |
Frequently asked(5)
What is CVE-2018-17256?
CVE-2018-17256 is a medium vulnerability published on November 27, 2018. 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.
When was CVE-2018-17256 disclosed?
CVE-2018-17256 was first published in the National Vulnerability Database on November 27, 2018, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2018-17256 actively exploited?
CVE-2018-17256 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 46.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2018-17256?
CVE-2018-17256 has a CVSS v3 base score of 4.8 (NVD).
How do I remediate CVE-2018-17256?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2018-17256, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2018-17256
Is Your Infrastructure Affected by CVE-2018-17256?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.