Signal is active with 1 mentions in latest observed window
Recommended action window: Monitor and triage in normal cycle
NVD description
The Essential Blocks – Page Builder Gutenberg Blocks, Patterns & Templates plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the className, classHook, and blockId attributes in the Add to Cart block (essential-blocks/add-to-cart) in all versions up to, and including, 6.0.4. This is due to insufficient output escaping in the render_callback() function where these attributes are placed into class and data-id HTML attributes using raw sprintf() and implode() without esc_attr() escaping. While the outer wrapper div uses get_block_wrapper_attributes() which properly escapes, the inner divs do not. 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.
Priority
LOW
Exploitation
NONE
PoC
NONE
Patch
NONE
Momentum
NONE
CVE-2026-4658 Stored Cross-Site Scripting in Essential Blocks WordPress Plugin Versions Up to 6.0.4 https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-4658
Post summary
CVE-2026-4658 is a stored Cross‑Site Scripting vulnerability affecting Essential Blocks WordPress plugin versions up to 6.0.4, with no proof of concept, exploit code, or active exploitation reported.