---
id: "CVE-2026-116216"
kind: "vulnerability"
aliases: ["CVE-2026-116216"]
title: "MacCMS: comment form lets anonymous visitors post as any member"
severity: "medium"
cvss: 6.9
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["maccms", "package", "php", "self-hosted"]
not_affected_if: ["unknown"]
published_at: "2026-10-26T14:16:34+00:00"
first_seen_at: "2026-10-26T14:30:36+00:00"
updated_at: "2026-10-26T14:32:29+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-116216", "first_seen_at": "2026-10-26T14:30:36+00:00"}]
---

# MacCMS: comment form lets anonymous visitors post as any member

MacCMS v10 through 2026.1000.4056 accepts a user_id value from the comment submission in index/Comment::saveData(), a mass assignment flaw. An unauthenticated attacker can post comments attributed to any registered member, showing that member's avatar and name.

_Summary, check and fix written by a model from the sources; labelled as such._

## Timeline

- 2026-10-26T14:30:36+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-116216

## From the sources

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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