CVE-2023-5013Public exploitNetwork attack vector

Stored XSS via unencoded installer homepage content

Published Sep 16, 2023 · Updated Aug 2, 2024

Stored XSS in Pluck CMS 4.7.18 allows remote authenticated users to execute script through homepage content during installation. In install.php step 3, the cont2 form value flows to save_page(), whose sanitizePageContent() call disables HTML encoding before storing the homepage PHP file. The installer must remain unfinished, and a visitor must open the resulting homepage; successful exploitation runs attacker-supplied script in that visitor's browser.

CVSS severity5.4
Medium
EPSS probability0.51%
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 Pluck CMS 4.7.18 allows remote authenticated users to execute script through homepage content during installation. In install.php step 3, the cont2 form value flows to save_page(), whose sanitizePageContent() call disables HTML encoding before storing the homepage PHP file. The installer must remain unfinished, and a visitor must open the resulting homepage; successful exploitation runs attacker-supplied script in that visitor's browser.

The record

CVE
CVE-2023-5013
Published
Sep 16, 2023
Updated
Aug 2, 2024
Vendor
Pluck CMS
Product
Pluck CMS
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 16, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 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?

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

  1. Affected versionversion=4.7.18

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Pluck CMS · Pluck CMSversion=4.7.18

Published CVSS scores

2.1VulDBAV:N/AC:H/Au:S/C:N/I:P/A:N
2.6VulDBCVSS:3.1/AV:N/AC:H/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

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')
T1059.007JavaScript/JScript

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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