CVE-2026-57959
Medium
Description
Hi.Events through 1.9.0 contains a promo code validation vulnerability where reservation validates usage count before asynchronous UpdateEventStatisticsJob increments it, allowing attackers to redeem limited promo codes unlimited times. Attackers can sequentially reserve multiple orders with the same restricted promo code, each reading order_usage_count=0 and passing validation, then complete them all at discounted prices without concurrent requests.
SeverityMedium
CVSS5.9
Exploit probability—
ProductHi.Events
PublishedJun 29, 2026
First seenJun 29, 2026
Weakness typeCWE-367CWE-367
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| HiEventsDev Hi.Events | v ≤ 1.9.0 | — |
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