CVE-2024-45300

Bypassing promo code limitations with race conditions

MEDIUM
5.9
CVSS Score
Published: September 6, 2024 at 01:02 PM UTC
Updated: June 17, 2026 at 07:53 AM UTC
2 products affected across 2 vendorsAlfAlf

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Severity
MEDIUM5.9
Exploit prediction
EPSS 0.4%
SSVC
PoC

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 2.0-m5
Affected range stops below 2.0-m5, so it looks safe — our inference, not a vendor statement
v < 2.0-M5
Affected range stops below 2.0-M5, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCPoCAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
NETWORK
Complexity
HIGH
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-362

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