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CVE-2024-45300— Bypassing promo code limitations with race conditions

Quick assessment

Affected
alfio-event alf.io
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Alf.io是Alf.io开源的一款免费开源活动出席管理系统。 alf.io 2.0-M5之前版本存在安全漏洞，该漏洞源于一个竞态条件，可能允许用户绕过促销代码的数量限制，多次使用折扣券。

CVSS 7.5 · High EPSS 0.42% · P34

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2024-45300

Vulnerability Information
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Vulnerability Title
Bypassing promo code limitations with race conditions
Source: CVE Program / CVE List V5
Vulnerability Description
alf.io is an open source ticket reservation system for conferences, trade shows, workshops, and meetups. Prior to version 2.0-M5, a race condition allows the user to bypass the limit on the number of promo codes and use the discount coupon multiple times. In "alf.io", an event organizer can apply price discounts by using promo codes to your events. The organizer can limit the number of promo codes that will be used for this, but the time-gap between checking the number of codes and restricting the use of the codes allows a threat actor to bypass the promo code limit. Version 2.0-M5 fixes this issue.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
使用共享资源的并发执行不恰当同步问题(竞争条件)
Source: CVE Program / CVE List V5
Vulnerability Title
alf.io 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Alf.io是Alf.io开源的一款免费开源活动出席管理系统。 alf.io 2.0-M5之前版本存在安全漏洞，该漏洞源于一个竞态条件，可能允许用户绕过促销代码的数量限制，多次使用折扣券。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
alfio-event alf.io < 2.0-M5 -

II. Public POCs for CVE-2024-45300

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 8285 chars
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Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
100+ AI POC generations per month

III. Intelligence Information for CVE-2024-45300

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Patches & Fixes for CVE-2024-45300 (1)

Vendor Advisories for CVE-2024-45300 (1)

IV. Related Vulnerabilities

Same product: alf.io
Same vendor: alfio-event
Same weakness: CWE-362

V. Comments for CVE-2024-45300

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