CVE-2024-33909 Overview
CVE-2024-33909 is a Missing Authorization vulnerability [CWE-862] in the Avirtum iPages Flipbook plugin for WordPress. The flaw stems from incorrectly configured access control security levels that allow unauthenticated network requests to reach functionality that should be restricted. The issue affects iPages Flipbook from initial releases through version 1.5.1. An attacker can interact with protected plugin endpoints without holding the required authorization, leading to limited disclosure of information handled by the plugin.
Critical Impact
Unauthenticated attackers can reach plugin functionality protected by improperly enforced access controls, resulting in confidentiality impact on affected WordPress sites running iPages Flipbook through 1.5.1.
Affected Products
- Avirtum iPages Flipbook WordPress plugin
- All versions up to and including 1.5.1
- WordPress sites running the vulnerable plugin
Discovery Timeline
- 2026-06-17 - CVE-2024-33909 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2024-33909
Vulnerability Analysis
The vulnerability is a broken access control issue classified under [CWE-862] Missing Authorization. The iPages Flipbook plugin exposes functionality whose access control checks are either missing or misconfigured. Requests reach protected logic without verifying that the caller holds the required capability or role. The flaw is reachable over the network, requires no privileges, and needs no user interaction. Exploitation impacts confidentiality only, with no direct effect on integrity or availability of the host WordPress instance.
Root Cause
The plugin fails to enforce authorization checks on one or more handlers exposed through the WordPress request lifecycle. Typical patterns associated with [CWE-862] in WordPress plugins include AJAX callbacks registered via wp_ajax_nopriv_ without a corresponding capability check, REST API routes whose permission_callback returns true, and form submission handlers that omit current_user_can() or nonce verification before performing privileged operations. The result is that unauthenticated callers can invoke logic intended for authorized roles.
Attack Vector
An attacker sends crafted HTTP requests to the WordPress site hosting the vulnerable iPages Flipbook plugin. Because the request is unauthenticated and remotely reachable, exploitation can be automated against any internet-facing WordPress instance running version 1.5.1 or earlier. Refer to the Patchstack WordPress Vulnerability Advisory for advisory-level technical details.
No public proof-of-concept exploit code has been published, and the EPSS probability is 0.249% (percentile 15.989) as of 2026-06-18.
Detection Methods for CVE-2024-33909
Indicators of Compromise
- Unauthenticated HTTP requests targeting /wp-admin/admin-ajax.php with action parameters belonging to the iPages Flipbook plugin
- Requests to plugin REST endpoints under /wp-json/ referencing iPages Flipbook routes from unauthenticated sources
- Unexpected access patterns to URIs containing ipages-flipbook in web server access logs
Detection Strategies
- Inventory all WordPress sites and identify installations of iPages Flipbook at version 1.5.1 or earlier
- Review WordPress access logs for repeated anonymous requests to plugin-specific AJAX or REST endpoints
- Alert on high-volume scanning behavior against plugin paths from a single source IP
Monitoring Recommendations
- Forward WordPress and web server logs to a centralized analytics platform for correlation
- Track plugin version drift across managed WordPress fleets and flag installations stuck on vulnerable releases
- Monitor outbound traffic from the WordPress host for anomalous patterns that may follow data disclosure
How to Mitigate CVE-2024-33909
Immediate Actions Required
- Update the iPages Flipbook plugin to a version newer than 1.5.1 once the vendor publishes a fixed release
- If no patched version is available, deactivate and remove the plugin from production WordPress sites
- Restrict access to /wp-admin/admin-ajax.php and /wp-json/ plugin routes using a web application firewall
Patch Information
The vulnerability affects iPages Flipbook through version 1.5.1. Consult the Patchstack WordPress Vulnerability Advisory for the latest fix availability and apply the vendor-supplied update through the WordPress plugin manager.
Workarounds
- Deactivate iPages Flipbook until a patched version is installed
- Deploy a WAF rule that blocks unauthenticated requests to iPages Flipbook AJAX and REST endpoints
- Place the WordPress administrative surface behind network restrictions or authentication proxies where feasible
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
