CVE-2023-43359Public exploitNetwork attack vector

Browser script execution via unsanitized content metadata

Published Oct 19, 2023 · Updated Sep 12, 2024

Stored XSS in CMS Made Simple 2.2.18 allows remote authenticated users to execute JavaScript through crafted content metadata. The Content Manager stores Page Specific Metadata and Smarty data without adequate sanitization, then renders the payload when a user opens the main website. Panel access to edit content is required, and execution occurs in the browser of a user who visits the affected page.

CVSS severity5.4
Medium
EPSS probability0.46%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in CMS Made Simple 2.2.18 allows remote authenticated users to execute JavaScript through crafted content metadata. The Content Manager stores Page Specific Metadata and Smarty data without adequate sanitization, then renders the payload when a user opens the main website. Panel access to edit content is required, and execution occurs in the browser of a user who visits the affected page.

The record

CVE
CVE-2023-43359
Published
Oct 19, 2023
Updated
Sep 12, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1189
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 19, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 12, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.4NIST NVDCVSS: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 exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1189Drive-by Compromise

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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