What is CVE-2020-36889?

CVE-2020-36889 is a medium-severity vulnerability in Kentico Xperience, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2025-12-18.

How severe is CVE-2020-36889?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in Kentico Xperience

CVE-2020-36889

A stored cross-site scripting vulnerability in Kentico Xperience allows attackers to inject malicious scripts via error messages containing specially crafted object names. This allows malicious scripts to execute in users' browsers when administrators view error messages in the administration interface.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.002 (8.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

Affected products

Kentico Xperience — versions 0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

disclosure@vulncheck.com (Product, vendor-advisory, patch)
disclosure@vulncheck.com (Third Party Advisory, third-party-advisory)

Frequently asked questions

What is CVE-2020-36889?: CVE-2020-36889 is a medium-severity vulnerability in Kentico Xperience, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2025-12-18.
How severe is CVE-2020-36889?: Medium severity. CVSS v3 base score is 5.4 out of 10.