CVE-2026-57959: high-severity vulnerability in HiEventsDev Hi.Events
Hi.Events 1.9.0 - Promo Code Max-Usage Bypass via Asynchronous Job Race Condition
Published · Updated
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.2epss 0.3%
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.
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
Affected products
HiEventsDev · Hi.EventsRelated CVEs — HiEventsDev Hi.Events
In the same product, most dangerous first.
CVE-2026-76838HIGHHi.Events before 1.11.1-beta Server-Side Request Forgery via Unvalidated Webhook RedirectsEPSS 0.4%CVE-2026-57960HIGHHi.Events 1.9.0 - Unauthenticated Attendee PII Exposure via Check-in List short_idEPSS 0.4%CVE-2026-34455HIGHHi.Events: SQL Injection via Unvalidated sort_by Query Parameter in Multiple Repository ClassesEPSS 0.4%CVE-2026-60119MEDIUMHi.Events < 1.11.0 XSS via Event Title JSON.stringify InjectionEPSS 0.3%CVE-2026-60118MEDIUMHi.Events < 1.11.0 Hidden Ticket Enumeration via Order Creation EndpointEPSS 0.3%