Vulnerability · Published Oct 26, 2026 · Assigned by VulnCheck

CVE-2026-116216MacCMS v10 through 2026.1000.4056 Comment Impersonation via user_id Mass Assignment

Medium 5.3

In plain English

A medium-severity security flaw in maccms10 from maccmspro. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 19% of all known vulnerabilities).

Severity (CVSS 3.1)5.3Medium

Exploit odds (30 days)0.3%top 80.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
maccmspro	maccms10	0 – through 2021.1000.2000
magicblack	maccms10	0 – through 2026.1000.4056

Weakness: CWE-915 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

References

GitHub Issue #30 issue-tracking
https://github.com/maccmspro/maccms10/blob/7f388ee0008faf5b01e5df7bf5e5a6ff4bbe13e8/application/index/controller/Comment.php#L37-L95 technical-description
https://github.com/maccmspro/maccms10 product
VulnCheck Advisory: MacCMS v10 through 2026.1000.4056 Comment Impersonation via user_id Mass Assignment third-party-advisory