CVE-2026-116216 PUBLISHED

MacCMS v10 through 2026.1000.4056 Comment Impersonation via user_id Mass Assignment

Assigner: VulnCheck
Reserved: 25.10.2026 Published: 26.10.2026 Updated: 26.10.2026

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:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
CVSS Score: 6.9

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	None	Confidentiality	None
Attack Complexity	Low	Integrity	Low	Integrity	None
Attack Requirements	None	Availability	None	Availability	None
Privileges Required	None
User Interaction	None

CVSS 4.0

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
CVSS Score: 5.3

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	None
Privileges Required	None	Integrity Impact	Low
User Interaction	None	Availability Impact	None

CVSS 3.1

Product Status

Vendor	maccmspro
Product	maccms10
Versions	Default: unaffected affected from 0 to 2021.1000.2000 (incl.)

Vendor	magicblack
Product	maccms10
Versions	Default: unaffected affected from 0 to 2026.1000.4056 (incl.)

Credits

Abu Raihan Biswas finder

References

Problem Types

Improperly Controlled Modification of Dynamically-Determined Object Attributes CWE