| Title | OpenCart 4.1.0.3 Time-of-check Time-of-use |
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| Description | Unauthenticated TOCTOU Race Condition in OpenCart Checkout allows attackers to bypass business logic, leading to financial loss and inventory corruption. Concurrent requests can successfully apply single-use coupons multiple times (bypassing limits) and simultaneously deduct stock from products, causing negative inventory levels (overselling). This is exploitable via Guest Checkout (PR:N). |
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| Source | ⚠️ https://gist.github.com/KhanMarshaI/a55f125a55de1c0d4f41e66236027e01 |
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| User | KhanMarshal (UID 89610) |
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| Submission | 12/10/2025 11:28 (9 months ago) |
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| Moderation | 12/27/2025 09:41 (17 days later) |
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| Status | Accepted |
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| VulDB entry | 338494 [OpenCart up to 4.1.0.3 Single-Use Coupon race condition] |
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| Points | 19 |
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