What’s Vulnerable › Vulnerabilities

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

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-26 · updated 2026-10-26
• Weakness: CWE-915

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

• magicblack MacCMS10: through 2026.1000.4056
• maccmspro maccms10: through 2021.1000.2000

References

• https://github.com/maccmspro/maccms10
• https://github.com/maccmspro/maccms10/blob/7f388ee0008faf5b01e5df7bf5e5a6ff4bbe13e8/application/index/controller/Comment.php#L37-L95
• https://github.com/maccmspro/maccms10/issues/30
• https://www.vulncheck.com/advisories/maccms-v10-through-2026.1000.4056-comment-impersonation-via-user-id-mass-assignment

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