CVE-2024-34433: OCDI One Click Demo Import Vulnerability

CVE-2024-34433 Overview

CVE-2024-34433 is a PHP Object Injection vulnerability affecting the One Click Demo Import (OCDI) plugin for WordPress. The plugin deserializes untrusted data supplied to an affected code path, allowing an authenticated attacker with high privileges to trigger unsafe object instantiation. The flaw affects all versions of One Click Demo Import from unspecified early releases through 3.2.0. Successful exploitation can lead to remote code execution, data tampering, or full compromise of the WordPress instance when a suitable gadget chain is present in the site's loaded code. The issue is classified under CWE-502: Deserialization of Untrusted Data.

Critical Impact
An authenticated administrator-level attacker can inject a crafted serialized PHP object into the deserialization sink, potentially achieving arbitrary code execution against the WordPress backend.

Affected Products

OCDI One Click Demo Import plugin for WordPress, all versions up to and including 3.2.0
WordPress sites running the plugin with high-privilege user accounts exposed
Themes and stacks that bundle the plugin as part of their demo-import workflow

Discovery Timeline

2024-05-14 - CVE-2024-34433 published to the National Vulnerability Database
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2024-34433

Vulnerability Analysis

The vulnerability is a PHP Object Injection flaw introduced by unsafe use of PHP's unserialize() on attacker-influenced input within the One Click Demo Import plugin. When a serialized payload reaches the deserialization sink, PHP reconstructs objects and invokes their magic methods, such as __wakeup() or __destruct(). If any class loaded in the WordPress runtime defines exploitable behavior in these methods, an attacker can chain them into a POP (Property-Oriented Programming) gadget that performs sensitive operations. The plugin does not validate or restrict the classes eligible for deserialization, so the sink accepts arbitrary object graphs. See the Patchstack Vulnerability Analysis for additional detail.

Root Cause

The root cause is direct deserialization of untrusted, attacker-controlled data without integrity verification or class allowlisting. PHP's unserialize() triggers object construction and magic-method execution during instantiation, which turns any reachable class in the loaded codebase into a potential gadget. Because WordPress environments typically load many plugins and libraries, the attack surface for gadget chains is large.

Attack Vector

Exploitation requires network access to the WordPress site and an authenticated session with high privileges, typically administrator. The attacker submits a crafted serialized PHP payload through a plugin request path that reaches the vulnerable deserialization function. When the payload is deserialized, the resulting object chain executes attacker-defined operations. The scope of impact spans confidentiality, integrity, and availability of the site.

No public proof-of-concept exploit is currently listed for CVE-2024-34433, and the vulnerability is not present on the CISA Known Exploited Vulnerabilities list.

Detection Methods for CVE-2024-34433

Indicators of Compromise

HTTP requests to One Click Demo Import endpoints containing serialized PHP markers such as O: (object), a: (array), or s: (string) in request bodies or parameters.
Unexpected file creation, PHP file modification, or new administrator accounts in the WordPress installation following plugin usage.
Outbound network connections from the web server to unfamiliar hosts shortly after demo-import activity.

Detection Strategies

Review web server and WordPress access logs for POST requests to wp-admin/admin.php or admin-ajax.php referencing OCDI actions with serialized payloads.
Inspect the plugin's import history and generated files for entries that do not correspond to legitimate administrator activity.
Run integrity checks against the WordPress wp-content directory to identify unauthorized code changes.

Monitoring Recommendations

Enable audit logging for administrator account actions, including plugin imports and file uploads.
Alert on serialized PHP object signatures appearing in HTTP request parameters destined for plugin endpoints.
Track process creation from the PHP-FPM or web server user to detect post-exploitation command execution.

How to Mitigate CVE-2024-34433

Immediate Actions Required

Update the One Click Demo Import plugin to a version later than 3.2.0 that addresses the deserialization flaw.
Restrict administrator account access and enforce multi-factor authentication for all WordPress privileged users.
Audit existing WordPress installations for signs of prior exploitation, including rogue admin accounts and modified PHP files.

Patch Information

Refer to the Patchstack Vulnerability Analysis for the fixed release information. Site operators should upgrade the plugin through the WordPress plugin manager or WP-CLI to the latest available version above 3.2.0.

Workarounds

Disable and remove the One Click Demo Import plugin on sites where demo content import is not actively required.
Restrict access to wp-admin using IP allowlisting or a web application firewall until the plugin can be updated.
Apply WAF rules that block requests containing serialized PHP object patterns targeting plugin endpoints.

bash

# Update the One Click Demo Import plugin via WP-CLI
wp plugin update one-click-demo-import

# Verify the installed version is above 3.2.0
wp plugin get one-click-demo-import --field=version

# If patching is not immediately possible, deactivate the plugin
wp plugin deactivate one-click-demo-import