CVE-2026-57959 — Hi.Events 1.9.0 - Promo Code Max-Usage Bypass via Asynchronous Job Race Condition
Hi.Events through 1.9.0 contains a promo code validation vulnerability where reservation validates usage count before asynchronous UpdateEventStatisticsJob increments it, allowi…
Published: 2026-06-29 · CVSS: 8.2 · CVSS 4.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7