CVE-2025-15481 Overview
CVE-2025-15481 affects the Notification Bar for WordPress plugin through version 1.1.8. The plugin exposes an unauthenticated CSV export script that discloses all stored subscriber email addresses. Any remote attacker can access the endpoint without credentials and retrieve the full subscriber list. The vulnerability is classified under [CWE-306: Missing Authentication for Critical Function]. The flaw enables information disclosure of personal data collected by site owners through the notification bar subscription feature.
Critical Impact
Unauthenticated remote attackers can download the complete list of subscriber email addresses stored by the plugin, exposing personal data and enabling downstream phishing or spam campaigns.
Affected Products
- Notification Bar for WordPress plugin — versions up to and including 1.1.8
Discovery Timeline
- 2026-09-02 - CVE-2025-15481 published to NVD
- 2026-09-02 - Last updated in NVD database
Technical Details for CVE-2025-15481
Vulnerability Analysis
The Notification Bar for WordPress plugin ships a CSV export script intended for administrators to retrieve subscriber emails collected through the notification bar. The plugin fails to enforce authentication or capability checks on this endpoint. An unauthenticated attacker can request the export URL directly and receive a CSV file containing every stored subscriber email address.
The issue is a straightforward missing authentication check on a sensitive administrative function. The endpoint returns confidentiality-sensitive data without validating the requester's session, nonce, or WordPress capability. Sites using the plugin to collect newsletter or announcement subscribers leak their entire subscriber database to anonymous requests.
Root Cause
The root cause is the absence of an authentication and authorization gate on the CSV export handler. The plugin does not call WordPress capability functions such as current_user_can() or validate an administrative nonce before streaming the subscriber data. This design flaw maps directly to [CWE-306: Missing Authentication for Critical Function].
Attack Vector
Exploitation requires only network access to the target WordPress site. An attacker issues a single HTTP GET request to the plugin's export endpoint and receives the CSV response. No user interaction, credentials, or elevated privileges are required. See the WPScan Vulnerability Report for endpoint specifics.
Detection Methods for CVE-2025-15481
Indicators of Compromise
- Unauthenticated HTTP GET requests to the Notification Bar plugin's CSV export handler within the /wp-content/plugins/ path.
- Web server access logs showing text/csv responses returned to unauthenticated sessions.
- Anomalous outbound data transfers from the WordPress host containing subscriber email lists.
Detection Strategies
- Review web server and WAF logs for requests targeting the Notification Bar plugin's export script from external IP addresses without authenticated session cookies.
- Correlate requests to plugin admin-facing scripts with the absence of wordpress_logged_in_* cookies.
- Monitor for scanner user agents probing WordPress plugin directories for the Notification Bar CSV endpoint.
Monitoring Recommendations
- Enable full request logging on WordPress sites running the plugin and alert on responses containing CSV MIME types from plugin paths.
- Track subscriber table queries and CSV file generation events for baseline deviation.
- Configure alerts for large response bodies served from plugin URLs to unauthenticated clients.
How to Mitigate CVE-2025-15481
Immediate Actions Required
- Deactivate the Notification Bar for WordPress plugin until a patched release is confirmed available.
- Block external access to the plugin's export script at the web server or WAF layer.
- Notify affected subscribers if evidence of exploitation is present in access logs, in line with applicable data protection regulations.
Patch Information
At the time of NVD publication, the advisory documents the vulnerability in versions through 1.1.8. No fixed version is referenced in the enriched data. Site owners should monitor the WPScan Vulnerability Report and the plugin's WordPress.org listing for a patched release.
Workarounds
- Restrict access to the plugin directory using web server rules that require authentication for export scripts.
- Add a WAF rule that denies unauthenticated requests to the plugin's CSV export endpoint.
- Replace the plugin with an alternative notification bar solution that enforces capability checks on administrative functions.
# Example Apache rule to block unauthenticated access to the plugin export script
<LocationMatch "/wp-content/plugins/notification-bar/.*export.*\.php">
Require valid-user
</LocationMatch>
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
