CVE-2020-28470: Cross-site Scripting (XSS)

Severity: medium (CVSS 6.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-01-14 · updated 2026-06-17
Weakness: CWE-79

Description

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.

Affected products

@scullyio/scully: before 1.0.9 — fixed in 1.0.9

How to fix

Upgrade to a fixed version: @scullyio/scully 1.0.9. Check the vendor advisory for mitigations.

References

https://github.com/scullyio/scully/pull/1182
https://snyk.io/vuln/SNYK-JS-SCULLYIOSCULLY-1055829
https://github.com/scullyio/scully/pull/1182
https://snyk.io/vuln/SNYK-JS-SCULLYIOSCULLY-1055829

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