CVE-2026-42379: Templately Information Disclosure Flaw

CVE-2026-42379 Overview

CVE-2026-42379 is a Sensitive Data Exposure vulnerability affecting the WPDeveloper Templately WordPress plugin. The vulnerability allows attackers to retrieve embedded sensitive data through improper handling of information in sent data. This issue is classified under CWE-201 (Insertion of Sensitive Information Into Sent Data), indicating that the plugin exposes confidential information that should not be transmitted to external parties.

Critical Impact

Authenticated attackers with low privileges can extract sensitive information from WordPress sites running vulnerable versions of the Templately plugin, potentially leading to further compromise of the affected systems.

Affected Products

• WPDeveloper Templately plugin versions through 3.6.1

Discovery Timeline

• 2026-04-27 - CVE CVE-2026-42379 published to NVD
• 2026-04-27 - Last updated in NVD database

Technical Details for CVE-2026-42379

Vulnerability Analysis

This vulnerability stems from improper information handling within the Templately WordPress plugin. The plugin fails to adequately filter or sanitize sensitive data before including it in outbound communications or responses. An authenticated attacker with low-level privileges can exploit this flaw to access confidential information that the plugin inadvertently exposes.

The scope of impact extends beyond the vulnerable component itself, as indicated by the changed scope in the attack profile. This means successful exploitation can affect resources beyond the security scope of the vulnerable plugin, potentially exposing sensitive data from the broader WordPress installation.

Root Cause

The root cause is classified as CWE-201: Insertion of Sensitive Information Into Sent Data. The Templately plugin improperly includes sensitive information in data that is transmitted to users or external systems. This could include configuration details, authentication tokens, internal paths, or other confidential data that should remain protected.

Attack Vector

The vulnerability is exploitable over the network without requiring user interaction. An attacker needs only low-level authentication (such as a subscriber or contributor role in WordPress) to exploit this vulnerability. The attack complexity is low, meaning no special conditions or circumstances need to be met for successful exploitation.

The exploitation scenario involves an authenticated user making specific requests to the Templately plugin endpoints that return sensitive embedded data. The plugin's failure to properly sanitize or filter this information allows the attacker to retrieve data they should not have access to.

Detection Methods for CVE-2026-42379

Indicators of Compromise

• Unusual API requests to Templately plugin endpoints from low-privileged user accounts
• Abnormal data retrieval patterns accessing plugin configuration or template data
• Unexpected outbound data transmissions containing sensitive information
• Audit log entries showing repeated access to plugin-specific AJAX handlers

Detection Strategies

• Monitor WordPress access logs for suspicious requests to /wp-content/plugins/templately/ endpoints
• Implement web application firewall (WAF) rules to detect and alert on potential data exfiltration attempts
• Review plugin activity logs for unauthorized access to template or configuration data
• Configure security plugins to alert on unusual behavior from authenticated users with low privileges

Monitoring Recommendations

• Enable detailed logging for the Templately plugin and review logs regularly
• Set up alerts for any API requests that return larger-than-expected response payloads
• Monitor for bulk data requests from single user sessions that may indicate automated exploitation

How to Mitigate CVE-2026-42379

Immediate Actions Required

• Update the Templately plugin to the latest patched version immediately
• Review user accounts with authenticated access and verify their privilege levels are appropriate
• Audit recent access logs for any potential exploitation attempts
• Consider temporarily disabling the Templately plugin until the update can be applied

Patch Information

The vulnerability affects WPDeveloper Templately versions through 3.6.1. Site administrators should update to the latest version available through the WordPress plugin repository. For detailed vulnerability information, refer to the Patchstack Vulnerability Report.

Workarounds

• Restrict plugin access to only trusted administrator accounts until patching is complete
• Implement additional WAF rules to filter potentially malicious requests to Templately endpoints
• Temporarily revoke access for low-privilege WordPress users if the plugin cannot be immediately updated
• Enable WordPress debug logging to monitor for suspicious plugin activity

# WordPress configuration to enable debug logging
# Add to wp-config.php for monitoring
define('WP_DEBUG', true);
define('WP_DEBUG_LOG', true);
define('WP_DEBUG_DISPLAY', false);