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TI-2024-30371 Aliases CVE-2024-45300

Bypassing promo code limitations with race conditions

Priority HIGH 72CWE-362Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.0042 36th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed alf.io (alfio-event): 2.0-M5

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
alfio-eventalf.iobefore 2.0-M52.0-M5Patch availableCNA
  • alf.io Vendoralfio-event Affected before 2.0-M5 Fixed in 2.0-M5 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:alf:alf:*:*:*:*:*:*:*:*before 2.0-m5Vulnerablealfio-event
  • cpe:2.3:a:alf:alf:*:*:*:*:*:*:*:* Versions before 2.0-m5 Vulnerable ·alfio-event

Remediation

  • Fix · CNA alf.io (alfio-event) Fixed in 2.0-M5

Timeline

  1. 2026-10-02 Threatist record created from CVE-2024-45300

References

Exploit 1

Patch 1

  • TI-2026-27611 alf.io has an Authenticated RCE via Extension Script Sandbox Escape CVSS 3.1CRITICAL 9.1
  • TI-2024-16863 IDOR Vulnerability: Allowing Organization Owner to view the other Organizations API KEY and USERS CVSS 3.1HIGH 8.8
  • TI-2024-16862 IDOR make user can read e-mail log sent by other events CVSS 3.1HIGH 7.2
  • TI-2023-02118 Improper Neutralization of Special Elements Used in a Template Engine in alfio-event/alf.io CVSS 3.1HIGH 7.2
  • TI-2024-30370 alf.io's preloaded data as json is not escaped correctly CVSS 3.1MEDIUM 6.5
  • TI-2024-16855 Cross-Site Scripting (XSS) via File Upload in Alf.io CVSS 3.1MEDIUM 4.8
See all 9 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences