CVE-2023-5793Public exploitNetwork attack vector

Authenticated XSS via unescaped customblock_place interpolation

Published Oct 26, 2023 · Updated Jun 12, 2025

Cross-site scripting in Flusity CMS allows remote authenticated users to execute script in a dashboard user's browser via a crafted URL. The Dashboard's core/tools/customblock.php inserts customblock_place directly into a quoted loadCustomBlocCreateForm JavaScript call without escaping. Backend authentication and dashboard-user interaction are required; injected script runs in that user's browser under the site's origin.

CVSS severity3.5
Low
EPSS probability0.43%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in Flusity CMS allows remote authenticated users to execute script in a dashboard user's browser via a crafted URL. The Dashboard's core/tools/customblock.php inserts customblock_place directly into a quoted loadCustomBlocCreateForm JavaScript call without escaping. Backend authentication and dashboard-user interaction are required; injected script runs in that user's browser under the site's origin.

The record

CVE
CVE-2023-5793
Published
Oct 26, 2023
Updated
Jun 12, 2025
Vendor
Flusity
Product
Flusity CMS
Classifications
CWE-79, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 26, 2023CVE publishedPublication date reported by the CVE source.
  2. Jun 12, 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=n/a

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Flusity · Flusity CMSversion=n/a

Published CVSS scores

3.5VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N
5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
4.0VulDBAV:N/AC:L/Au:S/C:N/I:P/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 exploitPublished

Weakness, pattern, technique

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

Public exploit references

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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