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Advisories

MacCMS v10 through 2026.1000.4056 Race Condition via Card Redemption

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Severity
low
Date
Affecting

  • maccms10 <= 2021.1000.2000

  • maccms10 <= 2026.1000.4056

CWE
  • CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CVSS
2.3
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
Credit
Abu Raihan Biswas
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.

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