CVE-2024-9686: Order Notification For Telegram Auth Bypass

CVE-2024-9686 Overview

CVE-2024-9686 affects the Order Notification for Telegram plugin for WordPress developed by choplugins. The vulnerability stems from a missing capability check on the nktgnfw_send_test_message AJAX function in versions up to and including 1.0.1. Unauthenticated attackers can trigger test Telegram messages to the recipient configured in the plugin settings. The flaw is categorized as Missing Authorization [CWE-862] and carries a network-based attack vector with no privileges or user interaction required. While the impact is limited to integrity of outbound notifications, the issue can be abused to spam or harass the configured Telegram user through the site's own Bot API credentials.

Critical Impact
Unauthenticated attackers can invoke the plugin's test message endpoint to send arbitrary test notifications through the site's Telegram Bot API to the configured recipient.

Affected Products

Choplugins Order Notification for Telegram plugin for WordPress
All versions up to and including 1.0.1
WordPress installations that have the plugin activated and configured with a Telegram bot token

Discovery Timeline

2024-10-25 - CVE-2024-9686 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2024-9686

Vulnerability Analysis

The Order Notification for Telegram plugin registers an AJAX action, nktgnfw_send_test_message, intended to let administrators verify their Telegram Bot API integration from the plugin settings screen. The handler is exposed through both the wp_ajax_ and wp_ajax_nopriv_ hooks or lacks a permission check, allowing any unauthenticated visitor to invoke it. Because the endpoint reuses the plugin's stored bot token and chat ID, requests originating from anonymous users are sent to the Telegram API with the site's credentials. The issue is limited to integrity of notifications rather than data confidentiality or availability, but it can be leveraged for message flooding or targeted harassment of the configured recipient.

Root Cause

The root cause is a missing capability check inside admin_ajax.php at the nktgnfw_send_test_message function. The handler does not call current_user_can() or verify a valid nonce before executing the send routine. This design flaw maps directly to CWE-862: Missing Authorization. Reviewers can confirm the vulnerable code in the plugin source at the WordPress Plugin Source Code.

Attack Vector

Exploitation requires only an HTTP POST request to the WordPress admin-ajax.php endpoint with action=nktgnfw_send_test_message. No authentication, session cookie, or elevated role is required. The Telegram Bot API then delivers the resulting message to the chat ID stored in plugin settings. Additional detail is available in the Wordfence Vulnerability Report.

Detection Methods for CVE-2024-9686

Indicators of Compromise

Unauthenticated POST requests to /wp-admin/admin-ajax.php containing action=nktgnfw_send_test_message
Unexpected test messages arriving at the Telegram chat configured in plugin settings
Elevated outbound traffic from the WordPress host to api.telegram.org

Detection Strategies

Parse web server access logs for repeated admin-ajax.php calls carrying the nktgnfw_send_test_message action string from anonymous sources
Alert on admin-ajax.php requests lacking a valid wp-admin referrer or authenticated session cookie targeting plugin-specific actions
Correlate WordPress request logs with egress traffic to api.telegram.org to identify abuse of the plugin's bot credentials

Monitoring Recommendations

Enable verbose logging on the WordPress AJAX endpoint and forward events to a centralized log platform for retention and search
Track the installed plugin inventory and version across managed WordPress sites to identify hosts still running Order Notification for Telegram 1.0.1 or earlier
Monitor Telegram bot message volume for anomalies that could indicate scripted abuse of the test endpoint

How to Mitigate CVE-2024-9686

Immediate Actions Required

Deactivate the Order Notification for Telegram plugin on any WordPress site running version 1.0.1 or earlier until a patched release is verified
Rotate the Telegram bot token in BotFather if evidence of abuse appears, then update the plugin configuration with the new token
Restrict access to /wp-admin/admin-ajax.php from untrusted networks where feasible using a web application firewall rule

Patch Information

At the time of NVD publication, the advisory references the vulnerable code in version 1.0.1. Administrators should upgrade to the latest release available in the WordPress plugin repository once the vendor publishes a fix that adds a capability check and nonce validation to the nktgnfw_send_test_message handler. Review the Wordfence Vulnerability Report for the current fixed version status.

Workarounds

Block or rate-limit unauthenticated POST requests containing action=nktgnfw_send_test_message at the WAF or reverse proxy layer
Remove the plugin entirely if Telegram order notifications are not required for site operations
Replace the configured Telegram chat ID with a dedicated, low-value channel to reduce impact if the endpoint is abused

bash

# Example ModSecurity rule to block anonymous access to the vulnerable action
SecRule REQUEST_URI "@endsWith /wp-admin/admin-ajax.php" \
  "chain,id:1009686,phase:2,deny,status:403,log,msg:'Block CVE-2024-9686 nktgnfw_send_test_message'"
  SecRule ARGS:action "@streq nktgnfw_send_test_message" \
    "chain"
    SecRule &REQUEST_COOKIES:wordpress_logged_in_ "@eq 0"