Medium severity · published Oct 26, 2026
CVE-2026-116216
MacCMS v10 through 2026.1000.4056 Comment Impersonation via user_id Mass Assignment
New
5.3
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 19% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MA
maccms10 · maccmspro
through 2021.1000.2000 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-116216
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-116216
github.com
https://github.com/maccmspro/maccms10
github.com
https://github.com/maccmspro/maccms10/blob/7f388ee0008faf5b01e5df7bf5e5a6ff4bbe13e8/application/index/controller/Comment.php#L37-L95
github.com
https://github.com/maccmspro/maccms10/issues/30
www.vulncheck.com
https://www.vulncheck.com/advisories/maccms-v10-through-2026.1000.4056-comment-impersonation-via-user-id-mass-assignment
More from maccms10
9.1
CVE-2026-116214
MacCMS v10 before 2026.1000.4054 Account Takeover via Unbound Password Recovery Code
3.1
CVE-2026-116215
MacCMS v10 through 2026.1000.4056 Race Condition via Card Redemption