CVE-2025-58919 Overview
CVE-2025-58919 is a missing authorization vulnerability affecting the guihom Wide Banner WordPress plugin (wide-banner) in versions up to and including 1.0.4. The flaw stems from incorrectly configured access control security levels, allowing unauthorized users to reach plugin functionality that should be restricted to privileged roles. The weakness is classified under CWE-862: Missing Authorization.
An attacker can exploit the vulnerability remotely over the network without authentication or user interaction. Successful exploitation results in low-impact integrity effects on the WordPress site running the affected plugin.
Critical Impact
Unauthenticated attackers can invoke plugin actions that lack proper authorization checks, enabling unauthorized modification of Wide Banner plugin data on affected WordPress sites.
Affected Products
- guihom Wide Banner plugin for WordPress, versions n/a through <= 1.0.4
Discovery Timeline
- 2025-09-26 - CVE-2025-58919 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2025-58919
Vulnerability Analysis
The Wide Banner plugin exposes one or more request handlers that fail to verify whether the requesting user has the appropriate role or capability. In WordPress plugin architecture, sensitive actions such as creating, updating, or deleting banner content should be gated by current_user_can() capability checks and by nonce validation for state-changing operations. The Patchstack advisory categorizes this issue as broken access control, indicating that these authorization guards are either missing or improperly scoped.
Because the attack vector is network-based and requires no authentication or user interaction, an attacker only needs to send crafted HTTP requests to the vulnerable endpoints. The impact is limited to integrity, meaning attackers can alter plugin-controlled data but cannot directly extract sensitive information or take the site offline through this flaw alone.
Root Cause
The root cause is an absent or insufficient authorization check on plugin actions. The plugin registers request handlers accessible to lower-privileged or unauthenticated contexts without validating the caller's WordPress capabilities. This misconfiguration allows requests to reach code paths intended only for administrators.
Attack Vector
An unauthenticated remote attacker sends HTTP requests directly to the plugin's exposed endpoints, typically through admin-ajax.php, REST API routes, or admin-post handlers registered by the plugin. Because the plugin does not enforce role checks, WordPress executes the requested action on behalf of the attacker.
No verified public exploit code is available for CVE-2025-58919. Refer to the Patchstack WordPress Vulnerability Advisory for the authoritative technical description.
Detection Methods for CVE-2025-58919
Indicators of Compromise
- Unexpected modifications to Wide Banner plugin content, settings, or database entries without corresponding administrator activity in audit logs.
- HTTP POST requests to wp-admin/admin-ajax.php or plugin-specific REST endpoints originating from unauthenticated sessions or unusual IP addresses.
- New or altered banner records that do not correlate with legitimate editorial workflows.
Detection Strategies
- Inventory WordPress installations to identify sites running the wide-banner plugin at version 1.0.4 or earlier.
- Review web server access logs for requests targeting Wide Banner plugin action handlers, especially from clients that never authenticated to wp-login.php.
- Correlate WordPress database change events with authenticated administrator sessions to surface unauthorized modifications.
Monitoring Recommendations
- Enable WordPress audit logging to record plugin option changes and content modifications with user attribution.
- Alert on anomalous request volumes to admin-ajax.php actions associated with the Wide Banner plugin.
- Track EPSS drift for CVE-2025-58919 to reassess exploitation likelihood if public exploit code emerges.
How to Mitigate CVE-2025-58919
Immediate Actions Required
- Identify all WordPress sites running the Wide Banner plugin at version 1.0.4 or earlier and prioritize them for remediation.
- Deactivate and remove the wide-banner plugin on any site where a fixed version is unavailable and the plugin is not business-critical.
- Restrict access to wp-admin and plugin endpoints using network controls or a web application firewall while remediation is planned.
Patch Information
At the time of publication, the Patchstack advisory lists affected versions through <= 1.0.4 with no fixed version explicitly noted in the enriched data. Consult the Patchstack WordPress Vulnerability Advisory for the current patch status and upgrade the plugin to a version above 1.0.4 if a vendor fix has since been released.
Workarounds
- Disable the Wide Banner plugin until a patched release is confirmed available from the vendor.
- Deploy WAF rules that block unauthenticated requests to Wide Banner action handlers, including relevant admin-ajax.phpaction parameters and plugin REST routes.
- Enforce the principle of least privilege on WordPress user accounts and disable unused REST API endpoints where feasible.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
