PT-2026-35178 · Unknown+1 · Maxsite Cms+1

Konchan · Published 2026-04-26 · Updated 2026-05-23 · CVE-2026-7011

Positive Technologies (AI Summary)

CVSS v2.0

3.3

Low

Base vector

AV:N/AC:L/Au:M/C:N/I:P/A:N

Name of the Vulnerable Software and Affected Versions MaxSite CMS versions prior to 109.4

Description A weakness exists in the Antispam Plugin component within the '/admin/plugin antispam' file. A remote attacker can perform a manipulation of the f logging file argument to execute cross-site scripting (XSS), which occurs when an application includes untrusted data in a web page without proper validation or encoding. This issue is caused by a lack of filtering via the htmlspecialchars() function, allowing attackers to bypass output encoding.

Recommendations Upgrade to version 109.4. As a temporary workaround, restrict access to the '/admin/plugin antispam' file to minimize the risk of exploitation.

Exploit

Fix

XSS

Code Injection

Weakness Enumeration

CWE-79

CWE-94

Related Identifiers

CVE-2026-7011

Affected Products

Antispam Plugin

Maxsite Cms

References · 16

• 🔥 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://twitter.com/lyrie_ai/status/2058111011014492363 · Twitter Post
• https://twitter.com/CVEnew/status/2048910137243623532 · Twitter Post
• https://github.com/maxsite/cms · Note
• https://twitter.com/lyrie_ai/status/2058111012000104479 · Twitter Post
• https://vuldb.com/vuln/359591/cti · Note
• https://twitter.com/lyrie_ai/status/2058111010037227904 · Twitter Post
• https://twitter.com/CVEarity/status/2048300367247790169 · Twitter Post
• https://vuldb.com/submit/796736 · Note
• https://twitter.com/VulmonFeeds/status/2048215332003737963 · Twitter Post
• https://twitter.com/lyrie_ai/status/2058111009584292158 · Twitter Post
• https://twitter.com/lyrie_ai/status/2058111010494448098 · Twitter Post