CVE-2020-36889: Kentico Xperience <= 12.0.90 Administration Interface Stored XSS

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-12-18 · updated 2026-06-17
Weakness: CWE-79

Description

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.

Affected products

Kentico Xperience: through 12.0.90

References

https://devnet.kentico.com/download/hotfixes
https://www.vulncheck.com/advisories/kentico-xperience-administration-interface-stored-xss

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