CVE-2026-7016Public exploitNetwork attack vector

Self-XSS via unencoded ushka name

Published Apr 26, 2026 · Updated Apr 26, 2026

Stored XSS in the ushki plugin in MaxSite CMS 109.0 through 109.3 allows remote authenticated users to run script via an ushka name. The plugin's admin.php renders each stored ushka name into an HTML span and input value without htmlspecialchars encoding. Exploitation requires high-privileged access and user interaction, and the vendor classifies the behavior as self-XSS, limiting script execution to the submitting user's administrative browser.

CVSS severity2.4
Low
EPSS probability0.21%
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 the ushki plugin in MaxSite CMS 109.0 through 109.3 allows remote authenticated users to run script via an ushka name. The plugin's admin.php renders each stored ushka name into an HTML span and input value without htmlspecialchars encoding. Exploitation requires high-privileged access and user interaction, and the vendor classifies the behavior as self-XSS, limiting script execution to the submitting user's administrative browser.

The record

CVE
CVE-2026-7016
Published
Apr 26, 2026
Updated
Apr 26, 2026
Vendor
MaxSite
Product
MaxSite CMS
Classifications
CWE-94, CWE-79
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

2.4VulDBCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:L/A:N
3.3VulDBAV:N/AC:L/Au:M/C:N/I:P/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

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')

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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