CVE-2024-3565: CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in vanderwijk Content Blocks (Custom Post Widget)
The Content Blocks (Custom Post Widget) plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's 'content_block' shortcode in all versions up to, and including, 3.3.0 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
AI Analysis
Technical Summary
CVE-2024-3565 is a stored cross-site scripting vulnerability in the vanderwijk Content Blocks (Custom Post Widget) WordPress plugin, affecting all versions up to 3.3.0. The issue stems from improper neutralization of input during web page generation, specifically insufficient input sanitization and output escaping of user-supplied attributes in the 'content_block' shortcode. This allows authenticated users with contributor or higher privileges to inject arbitrary JavaScript code that executes in the context of other users viewing the injected content.
Potential Impact
Successful exploitation allows an authenticated contributor or higher to inject persistent malicious scripts into pages, potentially leading to session hijacking, defacement, or other client-side attacks against users who view the compromised content. The vulnerability does not affect availability and requires authenticated access with low attack complexity. The CVSS score of 6.4 reflects a medium impact on confidentiality and integrity.
Mitigation Recommendations
Patch status is not yet confirmed — no official fix or patch links are currently available. Users should monitor the vendor's advisory channels for updates. Until a patch is released, restrict contributor-level access to trusted users only and consider disabling or removing the vulnerable plugin to prevent exploitation.
CVE-2024-3565: CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in vanderwijk Content Blocks (Custom Post Widget)
Description
The Content Blocks (Custom Post Widget) plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's 'content_block' shortcode in all versions up to, and including, 3.3.0 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2024-3565 is a stored cross-site scripting vulnerability in the vanderwijk Content Blocks (Custom Post Widget) WordPress plugin, affecting all versions up to 3.3.0. The issue stems from improper neutralization of input during web page generation, specifically insufficient input sanitization and output escaping of user-supplied attributes in the 'content_block' shortcode. This allows authenticated users with contributor or higher privileges to inject arbitrary JavaScript code that executes in the context of other users viewing the injected content.
Potential Impact
Successful exploitation allows an authenticated contributor or higher to inject persistent malicious scripts into pages, potentially leading to session hijacking, defacement, or other client-side attacks against users who view the compromised content. The vulnerability does not affect availability and requires authenticated access with low attack complexity. The CVSS score of 6.4 reflects a medium impact on confidentiality and integrity.
Mitigation Recommendations
Patch status is not yet confirmed — no official fix or patch links are currently available. Users should monitor the vendor's advisory channels for updates. Until a patch is released, restrict contributor-level access to trusted users only and consider disabling or removing the vulnerable plugin to prevent exploitation.
Technical Details
- Data Version
- 5.1
- Assigner Short Name
- Wordfence
- Date Reserved
- 2024-04-10T00:16:48.312Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 699f6c95b7ef31ef0b5667ee
Added to database: 2/25/2026, 9:41:41 PM
Last enriched: 4/9/2026, 7:58:38 PM
Last updated: 4/12/2026, 7:58:14 AM
Views: 10
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