CVE-2021-24384: JoomSport < 5.1.8 - Unauthenticated PHP Object Injection

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.1% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2021-07-06 · updated 2026-06-17
Weakness: CWE-502

Description

The joomsport_md_load AJAX action of the JoomSport WordPress plugin before 5.1.8, registered for both unauthenticated and unauthenticated users, unserialised user input from the shattr POST parameter, leading to a PHP Object Injection issue. Even though the plugin does not have a suitable gadget chain to exploit this, other installed plugins could, which might lead to more severe issues such as RCE

Affected products

beardev JoomSport – for Sports: Team & League, Football, Hockey & more: before 5.1.8 — fixed in 5.1.8

How to fix

Upgrade to a fixed version: beardev JoomSport – for Sports: Team & League, Football, Hockey & more 5.1.8. Check the vendor advisory for mitigations.

References

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