How severe is CVE-2024-45300?

CVE-2024-45300 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2024-45300 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-45300?

CVE-2024-45300 affects Alf. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2024-45300?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2024-45300 have an EU (EUVD) identifier?

Yes. CVE-2024-45300 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-41426.

When was CVE-2024-45300 published?

CVE-2024-45300 was published on 2024-09-06 and last updated on 2026-06-17.

CVE-2024-45300

CVE-2024-45300 is a high-severity vulnerability in Alf with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-362.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 0% (34th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-41426
Weakness: CWE-362
Affected product: Alf
Published: 2024-09-06
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2024-45300?: 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.
How severe is CVE-2024-45300?: CVE-2024-45300 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2024-45300 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-45300?: CVE-2024-45300 affects Alf. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2024-45300?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2024-45300 have an EU (EUVD) identifier?: Yes. CVE-2024-45300 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-41426.
When was CVE-2024-45300 published?: CVE-2024-45300 was published on 2024-09-06 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:alf:alf:*:*:*:*:*:*:*:*

More vulnerabilities in Alf

CVE-2024-25635 — High (CVSS 8.8): alf.io is an open source ticket reservation system. Prior to version 2.0-Mr-2402, organization owners can view the…
CVE-2023-2260 — High (CVSS 8.8): Authorization Bypass Through User-Controlled Key in GitHub repository alfio-event/alf.io prior to 2.0-M4-2304.
CVE-2023-2258 — High (CVSS 8.8): Improper Neutralization of Formula Elements in a CSV File in GitHub repository alfio-event/alf.io prior to 2.0-M4-2304.
CVE-2024-25628 — High (CVSS 7.6): Alf.io is a free and open source event attendance management system. In versions prior to 2.0-M4-2402 users can access…
CVE-2024-25634 — High (CVSS 7.2): alf.io is an open source ticket reservation system. Prior to version 2.0-Mr-2402, an attacker can access data from…
CVE-2023-2259 — High (CVSS 7.2): Improper Neutralization of Special Elements Used in a Template Engine in GitHub repository alfio-event/alf.io prior to…

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Other CWE-362 (Race Condition) vulnerabilities

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CVE-2014-0703 — Critical (CVSS 10.0): Cisco Wireless LAN Controller (WLC) devices 7.4 before 7.4.110.0 distribute Aironet IOS software with a race condition…
CVE-2010-1228 — Critical (CVSS 10.0): Multiple race conditions in the sandbox infrastructure in Google Chrome before 4.1.249.1036 have unspecified impact and…
CVE-2008-6598 — Critical (CVSS 10.0): Multiple race conditions in WANPIPE before 3.3.6 have unknown impact and attack vectors related to "bri restart logic."
CVE-2026-46137 — Critical (CVSS 9.8): In the Linux kernel, the following vulnerability has been resolved: mptcp: pm: ADD_ADDR rtx: fix potential…

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