CVE-2026-7015 Details
Description
A vulnerability has been found in MaxSite CMS up to 109.3. This issue affects some unknown processing of the component Guestbook Plugin. Such manipulation of the argument f_text/f_slug/f_limit/f_email leads to cross site scripting. The attack may be launched remotely. The exploit has been disclosed to the public and may be used. Upgrading to version 109.4 is capable of addressing this issue. The name of the patch is 8a3946bd0a54bfb72a4d57179fcd253f2c550cd7. It is suggested to upgrade the affected component. 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 Guestbook Plugin. The issue arises from improper sanitization of user input in the parameters f_text, f_slug, f_limit, and f_email. This vulnerability allows remote attackers to inject malicious scripts, which are then stored and can affect multiple users. Exploitation of this flaw could lead to account compromise, data manipulation, or unauthorized access to the administrative panel.
Users are advised to upgrade to MaxSite CMS version 109.4, which addresses this vulnerability. The update 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
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/maxsite/cms/ | [email protected] | Source CodeVendor |
| 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-guestbook-plugin-maxsite-cms.pdf.pdf | [email protected] | Partial Content |
| https://vuldb.com/submit/796740 | [email protected] | Technical Description |
| https://vuldb.com/vuln/359595 | [email protected] | AdvisoryExploitRemedy |
| https://vuldb.com/vuln/359595/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 Guestbook Plugin | 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] |