CVE-2024-3565
Content Blocks (Custom Post Widget) <= 3.3.0 - Authenticated (Contributor+) Stored Cross-Site Scripting via content_block Shortcode
CVSS Score
6.4
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-79 |
| Vendor | vanderwijk |
| Product | content blocks (custom post widget) |
| Published | Jun 1, 2024 |
| Last Updated | Apr 8, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
vanderwijk / Content Blocks (Custom Post Widget)
0 ≤ 3.3.0
References
wordfence.com: https://www.wordfence.com/threat-intel/vulnerabilities/id/16d8eab2-953a-46bf-a0f6-296bcea86305?source=cve plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/custom-post-widget/trunk/shortcode.php#L62 plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3078739%40custom-post-widget&new=3078739%40custom-post-widget&sfp_email=&sfph_mail=#file6
Credits
Alex Thomas