CVE-2023-53738Network attack vectorHinoki check available

Authenticated script execution via mishandled preview URLs

Published Dec 18, 2025 · Updated Dec 18, 2025

Reflected XSS in page preview URLs in Kentico Xperience 13.0.109 and earlier allows remote authenticated users to execute browser scripts. The preview URL handler improperly processes attacker-controlled URL content before reflecting it into the preview response. Exploitation requires authentication and a user to open the crafted preview URL, allowing script execution in that user's Xperience origin.

CVSS severity5.1
Medium
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Reflected XSS in page preview URLs in Kentico Xperience 13.0.109 and earlier allows remote authenticated users to execute browser scripts. The preview URL handler improperly processes attacker-controlled URL content before reflecting it into the preview response. Exploitation requires authentication and a user to open the crafted preview URL, allowing script execution in that user's Xperience origin.

The record

CVE
CVE-2023-53738
Published
Dec 18, 2025
Updated
Dec 18, 2025
Vendor
Kentico
Product
Kentico Xperience
Classifications
CWE-79, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 18, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 18, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=13.0.109

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Kentico · Kentico Xperienceversion=0 <=13.0.109

Published CVSS scores

5.4VulnCheckCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
5.1VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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