CVE-2023-53736Network attack vector

Authenticated script execution via reflected administration input

Published Dec 18, 2025 · Updated Dec 18, 2025

Reflected XSS in Kentico Xperience 13.0.120 and earlier allows remote authenticated users to execute scripts in the administration interface. Kentico has not disclosed the affected page, input parameter, or output-encoding operation that mishandles the reflected value. Exploitation requires authenticated access and active interaction by an administration user, exposing that user's administrative browser context.

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

What happened

Reflected XSS in Kentico Xperience 13.0.120 and earlier allows remote authenticated users to execute scripts in the administration interface. Kentico has not disclosed the affected page, input parameter, or output-encoding operation that mishandles the reflected value. Exploitation requires authenticated access and active interaction by an administration user, exposing that user's administrative browser context.

The record

CVE
CVE-2023-53736
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 <=13.0.120

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Kentico · Kentico Xperienceversion=0 <=13.0.120

Published CVSS scores

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
5.4VulnCheckCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A: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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