Vulnerability · Published Nov 7, 2026 · Assigned by Wordfence

CVE-2026-9601Stackable <= 3.19.9 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'save' Parameter

Medium 6.4

In plain English

A medium-severity cross-site scripting in Stackable – Page Builder Gutenberg Blocks from bfintal. There are no confirmed reports of exploitation so far.

Severity (CVSS 3.1)6.4Medium

Exploit odds (30 days)–no EPSS score yet

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

Official description

The Stackable – Page Builder Gutenberg Blocks plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'update_block_style' endpoint in all versions up to, and including, 3.19.9 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.

Affected products (as reported)

Vendor	Product	Versions
bfintal	Stackable – Page Builder Gutenberg Blocks	0 – through 3.19.9

Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

In plain English

Official description

Affected products (as reported)

References