CVE-2025-31879 Overview
CVE-2025-31879 is a missing authorization vulnerability in the Barcode Generator for WooCommerce WordPress plugin (embedding-barcodes-into-product-pages-and-orders) developed by Dmitry V., CEO of UKR Solution. The flaw affects all plugin versions from initial release through 2.0.4. Authenticated users with low-level privileges can modify plugin settings due to incorrectly configured access control checks. The issue is categorized under [CWE-862] Missing Authorization.
Critical Impact
Authenticated attackers with minimal privileges can alter Barcode Generator for WooCommerce settings, affecting store integrity and availability of barcode functionality on product pages and orders.
Affected Products
- Barcode Generator for WooCommerce plugin versions n/a through 2.0.4
- WordPress sites running WooCommerce with the embedding-barcodes-into-product-pages-and-orders plugin installed
- Publisher: Dmitry V. (UKR Solution)
Discovery Timeline
- 2025-04-01 - CVE-2025-31879 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2025-31879
Vulnerability Analysis
The Barcode Generator for WooCommerce plugin exposes settings-modification endpoints without enforcing capability checks. WordPress plugins are expected to verify user capabilities using functions such as current_user_can() and to validate request origin with nonce checks. This plugin fails to consistently apply these guardrails on settings-change actions through version 2.0.4.
An attacker holding any authenticated session, including low-privilege roles such as Subscriber or Customer, can invoke the affected handlers. Because WooCommerce stores frequently allow customer registration, the effective attack surface extends to any user of the storefront.
Root Cause
The root cause is a missing authorization control [CWE-862] on plugin settings handlers. The plugin performs the requested state change without confirming that the caller holds the administrative capability required to alter configuration. This is an access-control design defect rather than an input-validation flaw.
Attack Vector
Exploitation requires network access to the target WordPress site and a valid low-privilege account. The attacker sends a crafted HTTP request to the vulnerable settings endpoint exposed by the plugin. No user interaction is required beyond the attacker's authenticated session. Successful requests modify plugin configuration, which can disrupt barcode generation for orders or alter behavior visible to shoppers.
See the Patchstack Vulnerability Report for advisory details.
Detect Identity Attacks the Moment Authentication Fails
Singularity™ Identity surfaces credential misuse, lateral movement, and privilege escalation in real time, so you can contain the breach before it spreads.
Stop Identity AttacksDetection Methods for CVE-2025-31879
Indicators of Compromise
- Unexpected changes to Barcode Generator for WooCommerce plugin settings without corresponding administrator activity in WordPress audit logs.
- HTTP POST or admin-ajax.php requests to plugin-specific action handlers originating from non-administrator user sessions.
- New or modified plugin option rows in the wp_options table tied to the embedding-barcodes-into-product-pages-and-orders plugin.
Detection Strategies
- Review web server access logs for requests to plugin admin endpoints correlated with Subscriber or Customer role cookies.
- Deploy WordPress activity logging plugins to capture settings changes with the acting user ID and role.
- Alert on any settings-modification request where the authenticated user lacks the manage_options capability.
Monitoring Recommendations
- Baseline legitimate administrator behavior for the plugin and alert on deviations in source IP, user role, or request frequency.
- Monitor for privilege-escalation attempts and account creation spikes on public-registration WooCommerce stores.
- Forward WordPress and web server logs to a centralized analytics platform for correlation and long-term retention.
How to Mitigate CVE-2025-31879
Immediate Actions Required
- Inventory WordPress sites and identify installations of the Barcode Generator for WooCommerce plugin at version 2.0.4 or earlier.
- Restrict or disable open user registration on WooCommerce stores that do not require public accounts.
- Audit recent plugin settings changes and revert any unauthorized modifications.
Patch Information
At the time of the NVD entry, versions through 2.0.4 are affected and no fixed version is listed in the enriched data. Monitor the Patchstack Vulnerability Report and the plugin's WordPress.org page for a vendor-issued update, and apply it as soon as available.
Workarounds
- Deactivate and remove the Barcode Generator for WooCommerce plugin until a patched release is verified.
- Use a web application firewall to block requests to the plugin's settings action endpoints from non-administrator sessions.
- Enforce least privilege by limiting new registrations to the minimum role required and disabling unused REST API endpoints.
# Configuration example: WP-CLI commands to inventory and disable the plugin
wp plugin list --name=embedding-barcodes-into-product-pages-and-orders --fields=name,status,version
wp plugin deactivate embedding-barcodes-into-product-pages-and-orders
wp option get users_can_register
wp option update users_can_register 0
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
