Mass assignment in MacCMS lets anonymous comments impersonate users
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Tampering
- Confidentiality · integrity · availability
- None · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-915.
Summary
The maccmspro maccms10 product from 0 through 2021.1000.2000 and the magicblack maccms10 product through 2026.1000.4056 are affected. The comment save function lets a request set arbitrary database columns, a mass assignment flaw (CWE-915). An unauthenticated remote attacker can submit anonymous comments with a crafted user ID to attribute them to any registered member, displaying that member's avatar and impersonating them.
Written with Claude Haiku 5.5 from the sources below · 2026-11-02
Description from the CNA
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| maccmspro | maccms10 | up to 2021.1000.2000 | — | No fix listed | CNA |
| magicblack | maccms10 | up to 2026.1000.4056 | — | No fix listed | CNA |
- maccms10 Vendormaccmspro Affected up to 2021.1000.2000 Fixed in — No fix listed CNA
- maccms10 Vendormagicblack Affected up to 2026.1000.4056 Fixed in — No fix listed CNA
Remediation
The sources list no fixed version for MacCMS v10.
Written with Claude Haiku 5.5 from the sources below · 2026-11-02
Timeline
- 2026-10-26 Threatist record created from CVE-2026-116216
- 2026-10-27 Alias added: GHSA-9f7c-9m42-3x6j
- 2026-10-27 Priority changed: MEDIUM → LOW
- 2026-11-02 CISA SSVC decision points changed
References
More maccmspro vulnerabilities
- TI-2026-80388 Password recovery flaw in MacCMS v10 allows account takeover CVSS 4.0CRITICAL 9.3
- TI-2026-80389 Race condition in MacCMS lets members reuse recharge cards CVSS 4.0LOW 2.3
Sources
- CVE-2026-116216 · CVE Program
- CVE-2026-116216 · NVD
- FIRST EPSS
- GHSA-9f7c-9m42-3x6j · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences