CVE-2024-24796

Event Manager and Tickets Selling Plugin for WooCommerce – WpEvently <= 4.1.1 - Authenticated (Contributor+) PHP Object Injection in mep_event_meta_save

2024-01-31 00:00
Ngô Thiên An (ancorn_)

Strategic Overview

Status
Patched in 4.1.2
Affected Plugin
Event Booking Manager for WooCommerce – Sell Tickets, Event Registration, RSVP & Event Calendar
Affected Version
<= 4.1.1
CVSS
8.8High
Weakness type
CWE-502 · Deserialization of Untrusted Data
CVE
CVE-2024-24796
View all Event Booking Manager for WooCommerce – Sell Tickets, Event Registration, RSVP & Event Calendar vulnerabilities

At a glance

CVE-2024-24796 is a high-severity Deserialization of Untrusted Data vulnerability in the Event Booking Manager for WooCommerce WordPress plugin, affecting versions <= 4.1.1. It carries a CVSS score of 8.8 (reachable over the network; low attack complexity; high confidentiality, integrity, availability impact). Exploitation requires an authenticated account at Contributor level or above. The issue is fixed in version 4.1.2; sites on affected versions should update now. Disclosed January 2024, reported by Ngô Thiên An (ancorn_).

Vulnerability Overview

The Event Manager and Tickets Selling Plugin for WooCommerce – WpEvently plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 4.1.1 via deserialization of untrusted input in the mep_event_meta_save function. This makes it possible for authenticated attackers, with contributor-level access and above, to inject a PHP Object. If a POP chain is present via an additional plugin or theme installed on the target system, it could allow the attacker to delete arbitrary files, retrieve sensitive data, or execute code.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no interaction from a victim user. A successful exploit has high impact on confidentiality, integrity, availability — full site compromise territory.

CWE-502: Deserialization of Untrusted Data

Reaching this weakness in Event Booking Manager for WooCommerce <= 4.1.1 takes an account at Contributor level or above. Deserialization of untrusted data means the application reconstructs objects from input a caller controls, letting the attacker choose which classes get instantiated and what their properties hold.

A workable chain turns deserialization into file writes, deletions or code execution, depending on what the loaded classes do in their magic methods. For Event Booking Manager for WooCommerce the fix is 4.1.2: builds <= 4.1.1 are affected, anything from 4.1.2 onward is not.

Remediation

Update to version 4.1.2, or a newer patched version

How does WordSec protect against this?

An attacker needs Contributor access first, so the firewall sees the attempt as traffic from a logged-in account: WordSec's web application firewall inspects request payloads before WordPress loads them. Classes like this one can leave something behind, so the staged malware scanner is the second half: it looks for dropped files and modified code rather than for the request that created them. None of that substitutes for the fix: Event Booking Manager for WooCommerce 4.1.2 closes this, and updating the plugin is the step that ends it.

  • Firewall
  • Scanner
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2024-24796https://www.wordfence.com/threat-intel/vulnerabilities/id/50812a8b-7d49-41fa-ba50-47d07a4b6caahttps://nvd.nist.gov/vuln/detail/CVE-2024-24796

Related records

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