PT-2025-35696 · WordPress · Vayu Blocks – Website Builder For The Block Editor

Jimmy Goucher + 1 · Published 2025-09-03 · Updated 2025-09-03 · CVE-2025-9378

Positive Technologies (AI Summary)

CVSS v3.1

6.4

Medium

Base vector

AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Name of the Vulnerable Software and Affected Versions Vayu Blocks – Website Builder for the Block Editor plugin for WordPress versions up to and including 1.3.9

Description The Vayu Blocks – Website Builder for the Block Editor plugin for WordPress is susceptible to Stored Cross-Site Scripting via multiple attributes in the Lottie block due to insufficient input sanitization and output escaping. This allows authenticated attackers with Contributor-level access or higher to inject arbitrary web scripts into pages. These scripts will execute when a user accesses the injected page.

Recommendations Update Vayu Blocks – Website Builder for the Block Editor plugin for WordPress to a version later than 1.3.9.

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2025-9378

Affected Products

Vayu Blocks – Website Builder For The Block Editor

References · 8

• https://nvd.nist.gov/vuln/detail/CVE-2025-9378 · Security Note
• https://t.me/cveNotify/134166 · Telegram Post
• https://plugins.trac.wordpress.org/browser/vayu-blocks/tags/1.3.5/trunk/inc/render/lottie/lottie.php#L102 · Note
• https://twitter.com/CVEnew/status/1963161326609690760 · Twitter Post
• https://plugins.trac.wordpress.org/changeset/3351839 · Note
• https://twitter.com/VulmonFeeds/status/1963169841998606643 · Twitter Post
• https://t.me/CVEtracker/31577 · Telegram Post
• https://wordfence.com/threat-intel/vulnerabilities/id/a92d53ab-9c59-4c9c-93e5-32dd05246249?source=cve · Note