CVE-2026-7013Public exploitNetwork attack vector

Admin-page script execution via unescaped mail settings

Published Apr 26, 2026 · Updated Apr 26, 2026

Stored cross-site scripting in MaxSite CMS 109.0 through 109.3 allows remote authenticated users to alter rendered admin-page content. The mail_send admin.php page inserts stored subject, sender, and attachment-path options into HTML value attributes without output encoding. An administrator must save crafted mail settings and later load the plugin page, so the demonstrated consequence is script execution in that administrator's browser.

CVSS severity2.4
Low
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

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Summary

What happened

Stored cross-site scripting in MaxSite CMS 109.0 through 109.3 allows remote authenticated users to alter rendered admin-page content. The mail_send admin.php page inserts stored subject, sender, and attachment-path options into HTML value attributes without output encoding. An administrator must save crafted mail settings and later load the plugin page, so the demonstrated consequence is script execution in that administrator's browser.

The record

CVE
CVE-2026-7013
Published
Apr 26, 2026
Updated
Apr 26, 2026
Vendor
MaxSite
Product
MaxSite CMS
Classifications
CWE-79, CWE-94
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Apr 26, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 26, 2026Record 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=109.0
  2. Affected versionversion=109.1
  3. Affected versionversion=109.2
  4. Affected versionversion=109.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

MaxSite · MaxSite CMSversion=109.0; version=109.1; version=109.2; version=109.3

Published CVSS scores

3.3VulDBAV:N/AC:L/Au:M/C:N/I:P/A:N
1.9INCIBE-CERTCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P
2.4VulDBCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-94Improper Control of Generation of Code ('Code Injection')

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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