Description
MacCMS v10 through 2026.1000.4056 contains a race condition vulnerability in Card::useData() that allows authenticated members to redeem one recharge card multiple times via the user/buy endpoint. Attackers can send many concurrent flag=card requests that pass the non-locking card read before it is marked used, inflating user_points to buy VIP upgrades and paid content.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| maccmspro | maccms10 | ≤ 2021.1000.2000 | — |
| magicblack | maccms10 | ≤ 2026.1000.4056 | — |
References
- GitHub Issue #30 issue-tracking
- https://github.com/maccmspro/maccms10/blob/7f388ee0008faf5b01e5df7bf5e5a6ff4bbe13e8/application/common/model/Card.php#L123-L160 technical-description
- https://github.com/maccmspro/maccms10 product
- VulnCheck Advisory: MacCMS v10 through 2026.1000.4056 Race Condition via Card Redemption third-party-advisory