CVE-2025-53993 Overview
CVE-2025-53993 is a sensitive information disclosure vulnerability in the Crocoblock JetPopup plugin for WordPress. The flaw allows authenticated attackers with low privileges to retrieve embedded sensitive data from the plugin's server responses. The issue affects all versions of JetPopup up to and including 2.0.15. The vulnerability is classified under CWE-201: Insertion of Sensitive Information Into Sent Data.
Critical Impact
Authenticated attackers can extract sensitive data embedded in JetPopup responses, exposing configuration or session-related information that supports follow-on attacks against WordPress sites.
Affected Products
- Crocoblock JetPopup plugin for WordPress
- All versions from unspecified initial release through 2.0.15
- WordPress sites using JetPopup as part of the JetPlugins ecosystem
Discovery Timeline
- 2025-08-20 - CVE-2025-53993 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2025-53993
Vulnerability Analysis
The JetPopup plugin embeds sensitive information within data sent to authenticated users through its plugin endpoints. An attacker holding a low-privilege account, such as a subscriber or contributor, can query these endpoints and read data intended to remain server-side. The exposure falls under the CWE-201 class, where sensitive fields leak through legitimate response channels rather than through a direct authorization bypass.
The confidentiality impact is high while integrity and availability remain unaffected. Exploitation requires network access to the WordPress instance and valid credentials at any privilege tier. No user interaction is needed beyond an authenticated HTTP request.
Root Cause
The root cause is improper output filtering in JetPopup's data handlers. The plugin returns object or configuration payloads that include fields not intended for the requesting user's role. Because the plugin does not strip privileged fields before serialization, any authenticated caller receives the full payload.
Attack Vector
An attacker authenticates to the WordPress site with any low-privilege role. The attacker then issues requests to JetPopup's AJAX or REST endpoints that return popup configuration or metadata. Sensitive fields embedded in the response are parsed and stored for reuse. Refer to the Patchstack JetPopup Vulnerability Advisory for endpoint-level technical details.
Detection Methods for CVE-2025-53993
Indicators of Compromise
- Unusual authenticated HTTP requests from low-privilege accounts to JetPopup endpoints such as /wp-admin/admin-ajax.php with action=jet_popup_* parameters.
- Elevated response sizes from JetPopup endpoints indicating full payload disclosure rather than filtered output.
- Repeated enumeration of popup identifiers by a single authenticated session.
Detection Strategies
- Review WordPress access logs for authenticated subscribers or contributors interacting with JetPopup AJAX or REST routes.
- Deploy a web application firewall rule that inspects JetPopup response payloads for known sensitive field names.
- Correlate low-privilege account activity with unusual data egress volumes to detect scraping behavior.
Monitoring Recommendations
- Enable verbose logging on wp-json/ and admin-ajax.php endpoints for the JetPopup plugin.
- Alert on newly registered low-privilege accounts that immediately query plugin-specific endpoints.
- Baseline typical response sizes for JetPopup endpoints and alert on deviations.
How to Mitigate CVE-2025-53993
Immediate Actions Required
- Update the JetPopup plugin to a version later than 2.0.15 as soon as Crocoblock publishes a fixed release.
- Audit WordPress user accounts and remove or disable low-privilege accounts that are not required.
- Rotate any credentials, API keys, or tokens that may have been embedded in JetPopup configuration data.
Patch Information
At the time of publication, the vulnerability affects JetPopup through version 2.0.15. Consult the Patchstack JetPopup Vulnerability Advisory and the Crocoblock changelog for the fixed release version and upgrade instructions.
Workarounds
- Deactivate the JetPopup plugin until a patched version is installed if popups are not business-critical.
- Restrict access to admin-ajax.php and JetPopup REST routes using web application firewall rules that require elevated roles.
- Disable open user registration on the WordPress site to reduce the pool of low-privilege accounts available for exploitation.
# Example WAF rule concept to block low-privilege JetPopup enumeration
# Deny authenticated requests to JetPopup AJAX actions from subscriber-role sessions
SecRule REQUEST_URI "@contains admin-ajax.php" \
"chain,deny,status:403,id:1005393,msg:'Block JetPopup sensitive data access'"
SecRule ARGS:action "@rx ^jet_popup_" \
"chain"
SecRule REQUEST_COOKIES:wordpress_logged_in_* "@rx .+"
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
