PT-2026-35178 · Maxsite · Cms

Konchan · Published 2026-04-26 · Updated 2026-04-26 · CVE-2026-7011

Mitre

CVSS v3.1

2.4

Low

AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:L/A:N

A weakness has been identified in MaxSite CMS up to 109.3. Affected by this vulnerability is an unknown functionality of the file /admin/plugin antispam of the component Antispam Plugin. Executing a manipulation of the argument f logging file can lead to cross site scripting. It is possible to launch the attack remotely. The exploit has been made available to the public and could be used for attacks. Upgrading to version 109.4 addresses this issue. This patch is called 8a3946bd0a54bfb72a4d57179fcd253f2c550cd7. Upgrading the affected component is advised. 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."

Exploit

Fix

Code Injection

XSS

Weakness Enumeration

CWE-94

CWE-79

Related Identifiers

CVE-2026-7011

Affected Products

Cms

References · 8

• 🔥 https://github.com/wnaspy/CVE/blob/main/Report-%20Stored%20XSS-in-antispam-plugin-maxsite-cms.pdf · Exploit
• https://github.com/maxsite/cms/releases/tag/v109 · Patch
• https://github.com/maxsite/cms/commit/8a3946bd0a54bfb72a4d57179fcd253f2c550cd7 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-7011 · Security Note
• https://vuldb.com/vuln/359591 · Note
• https://vuldb.com/submit/796736 · Note
• https://github.com/maxsite/cms · Note
• https://vuldb.com/vuln/359591/cti · Note