CVE-2026-49068 Overview
CVE-2026-49068 is a sensitive data exposure vulnerability in the Coupon Affiliates plugin for WordPress, affecting versions up to and including 7.8.1. The flaw allows unauthenticated network-based attackers to access information that should be restricted to privileged users. The weakness is tracked under CWE-497: Exposure of Sensitive System Information to an Unauthorized Control Sphere.
The vulnerability impacts WordPress sites running the Coupon Affiliates plugin (also distributed as woo-coupon-usage). Successful exploitation discloses confidential data without affecting integrity or availability.
Critical Impact
Unauthenticated remote attackers can retrieve sensitive subscriber or affiliate data from vulnerable WordPress installations without any user interaction.
Affected Products
- WordPress Coupon Affiliates plugin (woo-coupon-usage) versions up to and including 7.8.1
- WordPress installations using the affected plugin for WooCommerce affiliate tracking
- Sites exposing affiliate subscriber data through the plugin's endpoints
Discovery Timeline
- 2026-06-15 - CVE-2026-49068 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2026-49068
Vulnerability Analysis
The vulnerability resides in the Coupon Affiliates plugin's handling of subscriber-level data. The plugin fails to enforce proper access restrictions when serving information tied to affiliate accounts. As a result, data intended for authenticated, privileged contexts becomes reachable over the network.
The issue maps to [CWE-497], which describes scenarios where applications expose system or user information to actors outside the intended trust boundary. Because the attack vector is network-based and requires no authentication or user interaction, any internet-reachable WordPress site running a vulnerable plugin version is at risk.
The EPSS probability for this CVE is 0.398%, with a percentile of 31.45 as of 2026-06-18.
Root Cause
The root cause is insufficient authorization checks on plugin functionality that returns subscriber or affiliate data. The plugin treats requests as legitimate without verifying that the caller holds the required role or capability. Sensitive fields associated with affiliate accounts are returned in responses that should require elevated privileges.
Attack Vector
An attacker sends crafted HTTP requests to the affected WordPress site over the network. The plugin processes these requests and returns affiliate-related data without enforcing access controls. No credentials, tokens, or user interaction are required. The confidentiality impact is high, while integrity and availability remain unaffected.
Verified exploitation details are limited. Refer to the Patchstack Vulnerability Report for additional technical context.
Detection Methods for CVE-2026-49068
Indicators of Compromise
- Unexpected HTTP requests to Coupon Affiliates plugin endpoints under /wp-content/plugins/woo-coupon-usage/ or related REST routes
- Large volumes of unauthenticated requests querying affiliate or subscriber identifiers
- Outbound transfers of affiliate data to unknown IP addresses following plugin endpoint access
Detection Strategies
- Inventory all WordPress installations and identify sites running Coupon Affiliates plugin versions at or below 7.8.1
- Inspect web server access logs for anomalous request patterns targeting affiliate-related plugin paths
- Correlate unauthenticated request bursts with response payloads containing subscriber data fields
Monitoring Recommendations
- Enable verbose HTTP request logging on WordPress hosts running WooCommerce and affiliate plugins
- Deploy a Web Application Firewall (WAF) ruleset that flags unauthenticated access to plugin AJAX and REST endpoints
- Alert on response sizes that deviate from baselines for plugin endpoints, which can indicate bulk data extraction
How to Mitigate CVE-2026-49068
Immediate Actions Required
- Identify all WordPress sites running the Coupon Affiliates plugin and confirm the installed version
- Upgrade the plugin to a version newer than 7.8.1 as soon as the vendor patch is available
- Restrict access to WordPress administrative and plugin endpoints using network ACLs or a WAF until patching is complete
Patch Information
Review the Patchstack Vulnerability Report for the latest patched version and remediation guidance. Apply vendor-supplied updates through the WordPress plugin management interface or via WP-CLI.
Workarounds
- Temporarily disable the Coupon Affiliates plugin if a patched version is not yet available
- Place vulnerable endpoints behind authentication or IP allowlists at the reverse proxy or WAF layer
- Audit affiliate account data for exposure and rotate any credentials or tokens that may have been disclosed
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
