CVE-2026-27370: Chaty Plugin Information Disclosure Flaw

CVE-2026-27370 Overview

CVE-2026-27370 is an Insertion of Sensitive Information Into Sent Data vulnerability affecting the Premio Chaty plugin for WordPress. This vulnerability allows attackers to retrieve embedded sensitive data from the plugin, potentially exposing confidential information to unauthorized parties. The flaw exists in versions up to and including 3.5.1 of the Chaty plugin.

Critical Impact

Sensitive data exposure vulnerability in a widely-used WordPress chat widget plugin could allow attackers to harvest confidential information embedded in plugin communications.

Affected Products

• Premio Chaty WordPress Plugin versions through 3.5.1
• WordPress installations using vulnerable Chaty plugin versions

Discovery Timeline

• 2026-03-05 - CVE CVE-2026-27370 published to NVD
• 2026-03-05 - Last updated in NVD database

Technical Details for CVE-2026-27370

Vulnerability Analysis

This vulnerability is classified under CWE-201 (Insertion of Sensitive Information Into Sent Data). The Premio Chaty plugin, which provides chat widget functionality for WordPress sites, improperly handles sensitive information during data transmission. When the plugin sends data, it inadvertently includes sensitive information that should remain protected, allowing attackers to extract this embedded data.

The Chaty plugin is designed to add floating chat buttons to WordPress sites, enabling visitors to connect through various messaging platforms. The vulnerability occurs in how the plugin processes and transmits configuration data, potentially exposing API keys, user identifiers, or other sensitive configuration parameters that are embedded within the plugin's output.

Root Cause

The root cause of this vulnerability stems from improper data handling practices where sensitive information is included in data that gets sent to the client side or external services. The plugin fails to adequately sanitize or filter sensitive configuration values before including them in transmitted data, resulting in information leakage. This represents a fundamental flaw in the plugin's data handling architecture where the separation between sensitive backend configuration and publicly accessible frontend data is not properly maintained.

Attack Vector

Attackers can exploit this vulnerability by analyzing the data transmitted by the Chaty plugin during normal operation. Since sensitive information is embedded within sent data, an attacker with the ability to intercept or view plugin output can extract this information. This could be accomplished through:

1. Viewing the page source code where plugin data may be embedded
2. Intercepting network requests made by the plugin
3. Analyzing JavaScript objects or configuration data exposed to the browser

The vulnerability does not require authentication, as the sensitive data exposure occurs during normal plugin operation and the information may be accessible to any visitor who can view the page content where the chat widget is deployed.

Detection Methods for CVE-2026-27370

Indicators of Compromise

• Unusual access patterns to pages containing the Chaty widget from automated tools or scrapers
• Evidence of systematic scraping of configuration data from plugin assets
• Unauthorized access to communication channels or services that were configured in the plugin

Detection Strategies

• Review web server access logs for suspicious requests targeting Chaty plugin resources
• Monitor for automated scanning activity focused on WordPress plugin directories
• Implement content security policies to detect unexpected data exfiltration attempts
• Audit plugin configuration files for exposed sensitive credentials

Monitoring Recommendations

• Enable detailed logging for WordPress plugin activity
• Monitor for changes in plugin configuration that could indicate compromise
• Set up alerts for unusual outbound data patterns from web servers
• Regularly audit sensitive data exposure using security scanning tools

How to Mitigate CVE-2026-27370

Immediate Actions Required

• Update the Premio Chaty plugin to a patched version when available
• Audit current Chaty plugin configuration for any exposed sensitive data
• Rotate any API keys or credentials that may have been exposed through the plugin
• Consider temporarily disabling the plugin until a security patch is released

Patch Information

Administrators should monitor the Patchstack Vulnerability Database Entry for updates on patch availability. The vulnerability affects Chaty versions through 3.5.1, and users should upgrade to the latest patched version as soon as it becomes available from Premio.

Workarounds

• Temporarily disable the Chaty plugin if it is not critical to site operations
• Review and minimize the sensitive configuration data stored in the plugin settings
• Implement a Web Application Firewall (WAF) to help filter potentially sensitive data in responses
• Use network-level monitoring to detect and alert on sensitive data patterns leaving the server