What is CVE-2020-28470?

CVE-2020-28470 is a high-severity vulnerability in Scully, classified under Cross-site Scripting. CVSS score: 7.3/10. Published 2021-01-14.

How severe is CVE-2020-28470?

High severity. CVSS v3 base score is 7.3 out of 10.

XSS in Scully

CVE-2020-28470

This affects the package @scullyio/scully before 1.0.9. The transfer state is serialised with the JSON.stringify() function and then written into the HTML page.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2021-01-14 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L.

EPSS exploit prediction

EPSS: 0.008 (55.9th percentile), scored 2026-10-03.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 56th percentile — 55.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

Scully
@Scullyio/scully — versions unspecified

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

snyk.io/vuln/SNYK-JS-SCULLYIOSCULLY-1055829 (Third Party Advisory)
github.com/scullyio/scully/pull/1182 (Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2020-28470?: CVE-2020-28470 is a high-severity vulnerability in Scully, classified under Cross-site Scripting. CVSS score: 7.3/10. Published 2021-01-14.
How severe is CVE-2020-28470?: High severity. CVSS v3 base score is 7.3 out of 10.