Event Espresso 4 Decaf <= 5.0.28.decaf - Cross-Site Request Forgery
Strategic Overview
- Status
- Patched in 5.0.31.decaf
- Affected Plugin
- Event Espresso – Event Registration & Ticketing Sales
- Affected Version
<= 5.0.28.decaf- CVSS
- 4.3Medium
- Weakness type
- CWE-352 · Cross-Site Request Forgery (CSRF)
- CVE
CVE-2024-56251
At a glance
CVE-2024-56251 is a medium-severity Cross-Site Request Forgery (CSRF) vulnerability in the Event Espresso WordPress plugin, affecting versions <= 5.0.28.decaf. It carries a CVSS score of 4.3 (reachable over the network; low attack complexity). Exploitation requires no authentication. The issue is fixed in version 5.0.31.decaf; sites on affected versions should update now. Disclosed December 2024, reported by Dhabaleshwar Das.
Vulnerability Overview
The Event Espresso 4 Decaf plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 5.0.28.decaf. This is due to missing or incorrect nonce validation on a function. This makes it possible for unauthenticated attackers to perform an unauthorized action via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.
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 privileges on the target site.
CWE-352: Cross-Site Request Forgery (CSRF)
Reaching this weakness in Event Espresso <= 5.0.28.decaf takes a caller who can reach the endpoint. Cross-site request forgery abuses the fact that browsers attach a victim's cookies to any request, so a state-changing action that only checks who you are, not whether you meant to act, can be triggered from another site.
An attacker who gets a logged-in user to load a crafted page can perform that action as them, with the impact scaling to whatever the victim's role is allowed to do. For Event Espresso the fix is 5.0.31.decaf: builds <= 5.0.28.decaf are affected, anything from 5.0.31.decaf onward is not.
Remediation
Update to version 5.0.31.decaf, or a newer patched version
How does WordSec protect against this?
The attempt arrives as an ordinary request to Event Espresso: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Event Espresso 5.0.31.decaf closes this, and updating the plugin is the step that ends it.
- Firewall
- Alerts
External References
Related records
Same weakness class
Other vulnerabilities in Event Espresso – Event Registration & Ticketing Sales
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