CVE-2026-0894: medium-severity vulnerability in vanderwijk Content Blocks (Custom Post Widget)
Content Blocks (Custom Post Widget) <= 3.3.9 - Authenticated (Author+) Stored Cross-Site Scripting via content_block Shortcode
Published · Updated
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13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 6.4epss 0.2%
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.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Affected products
vanderwijk · Content Blocks (Custom Post Widget)Related CVEs — vanderwijk Content Blocks (Custom Post Widget)
In the same product, most dangerous first.
CVE-2024-3564HIGHContent Blocks (Custom Post Widget) <= 3.3.0 - Authenticated (Contributor+) Local File Inclusion via ShortcodeEPSS 0.6%CVE-2024-3565MEDIUMContent Blocks (Custom Post Widget) <= 3.3.0 - Authenticated (Contributor+) Stored Cross-Site Scripting via content_block ShortcodeEPSS 0.3%CVE-2024-6432MEDIUMContent Blocks (Custom Post Widget) <= 3.3.5 - Authenticated (Contributor+) Stored Cross-Site Scripting via content ParameterEPSS 0.3%