MacCMS v10 through 2026.1000.4056 Comment Impersonation via user_id Mass Assignment

Advisories

MacCMS v10 through 2026.1000.4056 Comment Impersonation via user_id Mass Assignment

Severity: medium
Date: 10/26/2026
Affecting: maccms10 <= 2021.1000.2000
maccms10 <= 2026.1000.4056
CVE: CVE-2026-116216
CWE: CWE-915 Improperly Controlled Modification of Dynamically-Determined Object Attributes
CVSS: 6.9
CVSS V4 Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
References: GitHub Issue #30
https://github.com/maccmspro/maccms10/blob/7f388ee0008faf5b01e5df7bf5e5a6ff4bbe13e8/application/index/controller/Comment.php#L37-L95
https://github.com/maccmspro/maccms10
Credit: Abu Raihan Biswas
Description: MacCMS v10 through 2026.1000.4056 contains a mass assignment vulnerability in index/Comment::saveData() that allows unauthenticated attackers to set arbitrary mac_comment columns including user_id. Attackers can submit anonymous comments with a crafted user_id parameter to attribute them to any registered member, displaying that member's avatar and impersonating them.

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