EUVD-2026-78272
GHSA-8hcp-m735-89f4
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Unauthenticated network-accessible AJAX endpoint; confidentiality limited to metadata/PDF URLs with no code execution, integrity, or availability impact.
Primary rating from Vendor (Wordfence).
CVSS VectorNVD
Lifecycle Timeline
2DescriptionNVD
The 3D FlipBook - PDF Embedder, PDF Flipbook Viewer, Flipbook Image Gallery plugin for WordPress is vulnerable to Sensitive Information Exposure in all versions up to, and including, 1.16.20 via the 'id' parameter. This makes it possible for unauthenticated attackers to extract sensitive data including the full metadata payload of password-protected flipbooks - including title, outline, props, and the serialized data blob containing the underlying PDF file's direct URL - bypassing WordPress post-password confidentiality. Flipbook post IDs can be pre-enumerated via the also-unauthenticated fb3d_send_posts AJAX action, requiring no prior knowledge to target specific flipbooks.
AnalysisAI
Unauthenticated information disclosure in the 3D FlipBook - PDF Embedder, PDF Flipbook Viewer, Flipbook Image Gallery WordPress plugin (all versions ≤1.16.20) allows any remote attacker to retrieve the full metadata payload of password-protected flipbooks - including title, outline, props, and the serialized data blob containing the underlying PDF file's direct URL - bypassing WordPress post-password confidentiality entirely. The plugin's AJAX handler in inc/ajax-get.php processes the 'id' parameter without verifying that the requestor has authenticated against the post password, and a companion unauthenticated AJAX action (fb3d_send_posts) enables systematic enumeration of all flipbook post IDs with no prior knowledge of the target site's content structure. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires that the target WordPress site has the 3D FlipBook plugin installed and active at version 1.16.20 or earlier, and that at least one flipbook post has been configured with WordPress post-password protection. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 score of 5.3 Medium (AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N) correctly reflects the remote, zero-authentication, zero-interaction nature of exploitation, but the C:L designation may understate the business impact for organizations relying on flipbook password protection to gate commercially sensitive PDFs such as financial reports, internal policies, or contracts. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Update the plugin to the version introduced by SVN changeset 3661282, which applies a fix to the unauthenticated AJAX handlers in inc/ajax-get.php (see https://plugins.trac.wordpress.org/changeset?reponame=&old=3661282%40interactive-3d-flipbook-powered-physics-engine&new=3661282%40interactive-3d-flipbook-powered-physics-engine). … Detailed patch versions, workarounds, and compensating controls in full report. |
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