CVE-2025-54734 Overview
CVE-2025-54734 is a Missing Authorization vulnerability in the bPlugins B Slider plugin for WordPress. The flaw affects all versions of B Slider up to and including 1.1.30. Attackers can exploit incorrectly configured access control on plugin endpoints without authentication or user interaction. The issue is tracked under CWE-862: Missing Authorization and stems from broken access control in the plugin's request handlers.
Critical Impact
Unauthenticated network attackers can invoke restricted plugin functionality, leading to unauthorized modification of slider content on affected WordPress sites.
Affected Products
- bPlugins B Slider (b-slider) WordPress plugin
- Versions from n/a through <= 1.1.30
- WordPress installations with the vulnerable plugin active
Discovery Timeline
- 2025-08-28 - CVE-2025-54734 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2025-54734
Vulnerability Analysis
The B Slider plugin exposes functionality through WordPress action handlers and REST endpoints that lack proper capability checks. Under [CWE-862], the plugin fails to verify whether the requester holds the required privileges before executing sensitive operations. An unauthenticated attacker can send crafted HTTP requests directly to these endpoints and trigger actions intended for administrators.
Because the CVSS scope is changed and integrity impact is low, exploitation lets attackers alter data managed by the plugin without breaching confidentiality or availability. This class of flaw is common in WordPress plugins that register admin-ajax.php hooks or REST routes without a permission_callback or current_user_can() check.
Root Cause
The root cause is missing authorization enforcement on one or more callbacks registered by the plugin. The handlers either omit capability checks entirely or accept requests from the nopriv variant of WordPress AJAX actions. As a result, the server treats anonymous requests as authorized to perform privileged operations.
Attack Vector
Exploitation occurs over the network against the target WordPress site. The attacker sends HTTP POST or GET requests to the plugin's exposed endpoint with parameters that invoke restricted operations. No credentials, tokens, or user interaction are required. See the Patchstack Vulnerability Report for endpoint-level technical details.
Detection Methods for CVE-2025-54734
Indicators of Compromise
- Unexpected modifications to B Slider content, settings, or slide entries within wp_options or plugin-specific database tables.
- Anonymous HTTP requests to wp-admin/admin-ajax.php referencing B Slider actions or to /wp-json/ routes exposed by the plugin.
- New or altered slider records with no corresponding administrator session in access logs.
Detection Strategies
- Inspect web server access logs for POST requests to admin-ajax.php containing B Slider action names originating from unauthenticated sessions.
- Deploy a web application firewall rule that requires a valid nonce and authenticated session cookie for B Slider endpoints.
- Compare current plugin database records against known-good backups to identify unauthorized changes.
Monitoring Recommendations
- Enable WordPress audit logging to record option and post metadata changes tied to the plugin.
- Alert on spikes in requests targeting /wp-admin/admin-ajax.php with B Slider action parameters.
- Monitor for administrative content changes occurring outside normal editor working hours.
How to Mitigate CVE-2025-54734
Immediate Actions Required
- Update B Slider to a version later than 1.1.30 once a patched release is published by bPlugins.
- Deactivate and remove the B Slider plugin if a patched version is not yet available and the plugin is not essential.
- Restrict access to /wp-admin/admin-ajax.php and B Slider REST routes at the WAF or reverse proxy layer.
Patch Information
A fixed release beyond version 1.1.30 should be applied when made available by the vendor. Review the Patchstack Vulnerability Report for the latest patched version details and vendor advisory links.
Workarounds
- Apply virtual patching through a WAF to block unauthenticated requests to plugin endpoints.
- Enforce authentication on admin-ajax.php at the server level for non-public actions.
- Audit and revert any unauthorized slider modifications from a known-clean backup before applying the update.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
