HomeWordPress vulnerabilitiesContent Blocks (Custom Post Widget)
Content Blocks (Custom Post Widget) vulnerabilities
Content Blocks (Custom Post Widget) has 4 known vulnerabilities in this database. The most recent published record is dated 18 Apr 2026.
- Known vulnerabilities
- 4
- Active installs
- 10,000+
- Latest version
- 3.4.4
- Last updated
- 21 Sep 2026
- Most recent
- 18 Apr 2026
Find it in your WordPress dashboard under Plugins. Severity is based on the CVSS score published with the CVE where one is available.
| Vulnerability | Severity | Affected | Fix | Published |
|---|---|---|---|---|
| Cross-site scripting (XSS) CVE-2026-0894 | Medium 6.4 | Up to 3.3.9 | Fixed in a later version (latest 3.4.4) | 18 Apr 2026 |
| Cross-site scripting (XSS) CVE-2024-6432 | Medium 6.4 | Before 3.3.6 | Fixed in 3.3.6 | 20 Feb 2025 |
| Cross-site scripting (XSS) CVE-2024-3565 | Medium 6.4 | Before 3.3.1 | Fixed in 3.3.1 | 1 Jun 2024 |
| File inclusion CVE-2024-3564 | High 8.8 | Before 3.3.1 | Fixed in 3.3.1 | 1 Jun 2024 |
Read the published descriptions
- CVE-2026-0894, 18 Apr 2026
- 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, 3.3.9 due to insufficient input sanitization and output escaping on user supplied values consumed from user-created content blocks. 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. CVE record
- CVE-2024-6432, 20 Feb 2025
- The Content Blocks (Custom Post Widget) plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the ‘content’ parameter within the plugin's shortcode Content Block in all versions up to, and including, 3.3.5 due to insufficient input sanitization and output escaping. 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. CVE record
- CVE-2024-3565, 1 Jun 2024
- 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. CVE record
- CVE-2024-3564, 1 Jun 2024
- The Content Blocks (Custom Post Widget) plugin for WordPress is vulnerable to Local File Inclusion in all versions up to, and including, 3.3.0 via the plugin's 'content_block' shortcode. This makes it possible for authenticated attackers, with contributor-level access and above, to include and execute arbitrary files on the server, allowing the execution of any PHP code in those files. This can be used to bypass access controls, obtain sensitive data, or achieve code execution in cases where images and other “safe” file types can be uploaded and included. CVE record
What to do if you run Content Blocks (Custom Post Widget)
If you run Content Blocks (Custom Post Widget), open WordPress and check the installed version in Plugins. Compare it with the affected versions in the vulnerability record. If a fixed version is available, take a current backup and update to that version or the latest supported release.
If no fixed version exists, consider disabling and removing the plugin or replacing it with a maintained alternative. After dealing with the affected software, check administrator users, unexpected file changes, redirects, unfamiliar pages and security logs for signs that the site may already have been altered.
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