CVE-2026-7011Public exploitNetwork attack vector

Administrator-context script execution via unescaped logging filename

Published Apr 26, 2026 · Updated Apr 26, 2026

Stored cross-site scripting in the MaxSite CMS Antispam Plugin 109.0 through 109.3 allows remote authenticated users to run scripts. The plugin_antispam settings form inserts the stored f_logging_file option directly into an HTML input value without htmlspecialchars() encoding. Administrative access is required to save and revisit the crafted value, so script execution occurs in the same administrator's browser context.

CVSS severity4.8
Medium
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored cross-site scripting in the MaxSite CMS Antispam Plugin 109.0 through 109.3 allows remote authenticated users to run scripts. The plugin_antispam settings form inserts the stored f_logging_file option directly into an HTML input value without htmlspecialchars() encoding. Administrative access is required to save and revisit the crafted value, so script execution occurs in the same administrator's browser context.

The record

CVE
CVE-2026-7011
Published
Apr 26, 2026
Updated
Apr 26, 2026
Vendor
MaxSite
Product
MaxSite CMS
Classifications
CWE-94, CWE-79, T1059.007
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

Compare your product and version with the public record. A matching version still requires validation against your environment.

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
2.4VulDBCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:L/A:N
1.9VulDBCVSS: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
4.8VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA: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-94Improper Control of Generation of Code ('Code Injection')
CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007Command and Scripting Interpreter: JavaScript/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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