What is CVE-2020-27428?

CVE-2020-27428 is a medium-severity vulnerability in Mit Scratch-Svg-Renderer, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2022-01-06.

How severe is CVE-2020-27428?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Mit Scratch-Svg-Renderer

CVE-2020-27428

A DOM-based cross-site scripting (XSS) vulnerability in Scratch-Svg-Renderer v0.2.0 allows attackers to execute arbitrary web scripts or HTML via a crafted sb3 file.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2022-01-06 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.006 (49.0th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 49th percentile — 49.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: -0.000

Affected products

Mit Scratch-Svg-Renderer — versions 0.2.0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

github.com/LLK/scratch-svg-renderer/commit/7c74ec7de3254143ec3c557677f5355a90a3… (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2020-27428?: CVE-2020-27428 is a medium-severity vulnerability in Mit Scratch-Svg-Renderer, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2022-01-06.
How severe is CVE-2020-27428?: Medium severity. CVSS v3 base score is 6.1 out of 10.