CVE-2026-7016 Details
Description
A vulnerability was found in MaxSite CMS up to 109.3. Impacted is an unknown function of the component ushki Plugin. Performing a manipulation of the argument f_ushka_new/f_ushk results in cross site scripting. Remote exploitation of the attack is possible. The exploit has been made public and could be used. Upgrading to version 109.4 is recommended to address this issue. The patch is named 8a3946bd0a54bfb72a4d57179fcd253f2c550cd7. Upgrading the affected component is recommended. The vendor was informed early about this issue. They classify it as a "Self-XSS". They deployed a countermeasure: "Nevertheless, we consider this a violation of secure coding standards. The lack of filtering via `htmlspecialchars()` has already been fixed in the latest patch to prevent incorrect data display."
A cross-site scripting (XSS) vulnerability has been identified in MaxSite CMS versions prior to 109.4, specifically within the ushki plugin. The issue arises from an unknown function that fails to properly sanitize user input in the f_ushka_new and f_ushk arguments, allowing attackers to inject malicious scripts. This vulnerability is stored, meaning it does not require repeated interaction to exploit and can affect multiple users. The exploitation is remote and has been made public.
Users are advised to upgrade to MaxSite CMS version 109.4 or later. The latest version can be downloaded from the MaxSite CMS GitHub repository.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Apr 26, 2026CISA-ADP
Assessed Apr 27, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/maxsite/cms/ | [email protected] | Vendor |
| https://github.com/maxsite/cms/commit/8a3946bd0a54bfb72a4d57179fcd253f2c550cd7 | [email protected] | Source CodeVendor |
| https://github.com/maxsite/cms/releases/tag/v109 | [email protected] | Release NotesVendor |
| https://github.com/wnaspy/CVE/blob/main/Report-%20Stored%20XSS-in-ushki-plugin-maxsite-cms.pdf.pdf | [email protected] | Partial Content |
| https://vuldb.com/submit/796741 | [email protected] | Technical Description |
| https://vuldb.com/vuln/359596 | [email protected] | AdvisoryExploitRemedy |
| https://vuldb.com/vuln/359596/cti | [email protected] | Content Wall |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-79 | Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') | [email protected] |
| CWE-94 | Improper Control of Generation of Code ('Code Injection') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| MaxSite CMS | <= 109.3 |
CPE
Remediation
| |
| MaxSite ushki | All versions |
CPE
Remediation
| |
Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Apr 29, 2026 | Data Remediation | [email protected] |
| Apr 26, 2026 | New CVE Received | [email protected] |