CVE-2024-10294: Ce21 Suite Auth Bypass Vulnerability

CVE-2024-10294 Overview

CVE-2024-10294 affects the CE21 Suite plugin for WordPress in versions up to and including 2.2.0. The plugin exposes the ce21_single_sign_on_save_api_settings function without a capability check. Unauthenticated attackers can invoke this function over the network to modify plugin settings. The flaw maps to CWE-862: Missing Authorization and primarily impacts integrity of the WordPress installation.

Critical Impact
Unauthenticated remote attackers can alter Single Sign-On (SSO) API settings on affected WordPress sites, enabling configuration tampering that may redirect authentication flows or disrupt site operation.

Affected Products

CE21 Suite plugin for WordPress, versions ≤ 2.2.0
WordPress sites with the vulnerable plugin installed and active
Sites relying on CE21 Single Sign-On integration

Discovery Timeline

2024-11-09 - CVE-2024-10294 published to the National Vulnerability Database (NVD)
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2024-10294

Vulnerability Analysis

The CE21 Suite plugin registers an AJAX action that routes to the ce21_single_sign_on_save_api_settings function. This function persists Single Sign-On API configuration data submitted by the request. The handler is reachable without authentication and does not call WordPress capability functions such as current_user_can() before writing the supplied values. As a result, any anonymous HTTP client can update SSO configuration parameters that the plugin uses for authentication brokering.

The impact is constrained to integrity: an attacker can overwrite stored settings but cannot directly read confidential data or terminate the service through this primitive. However, manipulating SSO endpoints, client identifiers, or callback URLs may downstream affect login behavior and trust boundaries on the site.

Root Cause

The root cause is a missing authorization check [CWE-862]. The function processes administrative configuration changes but omits both current_user_can() verification and a valid nonce check via check_ajax_referer(). Code for the affected handler is visible in the WordPress Plugin Code Review at line 340 of ce21-functions.php.

Attack Vector

Exploitation requires only network access to the WordPress site's admin-ajax.php endpoint. An attacker sends a crafted POST request invoking the vulnerable action with attacker-controlled SSO settings. No authentication, user interaction, or prior site access is required. Refer to the Wordfence Vulnerability Report for additional analysis.

No verified public proof-of-concept code is currently available, so a synthetic exploit is not reproduced here.

Detection Methods for CVE-2024-10294

Indicators of Compromise

Unexpected POST requests to /wp-admin/admin-ajax.php referencing the ce21_single_sign_on_save_api_settings action from unauthenticated sessions
Unexplained changes to CE21 SSO API configuration entries in the WordPress wp_options table
New or modified SSO callback URLs, client IDs, or API endpoints in the plugin settings page

Detection Strategies

Review web server access logs for admin-ajax.php calls containing the vulnerable action name, particularly from clients without authenticated session cookies
Audit WordPress option changes related to CE21 Suite via database change tracking or audit-log plugins
Compare current plugin settings against a known-good baseline after deploying the plugin

Monitoring Recommendations

Forward WordPress and web server logs into a centralized analytics platform for correlation across multiple sites
Alert on anonymous AJAX requests that successfully invoke privileged administrative actions
Monitor for outbound traffic to unfamiliar SSO endpoints that may indicate tampered configuration

How to Mitigate CVE-2024-10294

Immediate Actions Required

Update the CE21 Suite plugin to a version later than 2.2.0 as soon as a patched release is available from the vendor
If no patched version is available, deactivate and remove the plugin until a fix is published
Audit current CE21 SSO settings and reset any values that may have been tampered with

Patch Information

The vulnerability affects CE21 Suite versions up to and including 2.2.0. Site administrators should consult the Wordfence Vulnerability Report and the WordPress plugin repository for the latest fixed release. No vendor advisory URL was published in the NVD record at the time of CVE assignment.

Workarounds

Restrict access to /wp-admin/admin-ajax.php via a web application firewall (WAF) rule that blocks unauthenticated invocations of the ce21_single_sign_on_save_api_settings action
Limit administrative endpoints to known IP ranges where feasible
Disable the CE21 Suite plugin on sites that do not require CE21 SSO functionality

bash

# Example WAF rule (ModSecurity-style) to block unauthenticated calls
# to the vulnerable AJAX action
SecRule REQUEST_URI "@contains /wp-admin/admin-ajax.php" \
  "chain,deny,status:403,id:1024294,msg:'Block CE21 SSO settings tampering (CVE-2024-10294)'"
  SecRule ARGS:action "@streq ce21_single_sign_on_save_api_settings" \
    "chain"
    SecRule &REQUEST_COOKIES:/wordpress_logged_in_/ "@eq 0"