CVE-2025-9378 - Vayu Blocks <= 1.3.9 - Authenticated (Contributor+) Stored Cross-Site Scripting via Multiple Block Attributes

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MEDIUM

Vayu Blocks <= 1.3.9 - Authenticated (Contributor+) Stored Cross-Site Scripting via Multiple Block Attributes

Published Sep 3, 2025

6.4

MEDIUM

CVSS 3.1

EPSS 0.24%

Description

The Vayu Blocks – Website Builder for the Block Editor plugin for WordPress is vulnerable to Stored Cross-Site Scripting via multiple attributes in the Lottie block in all versions up to, and including, 1.3.9 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

Vendor Themehunk Product Vayu Blocks – Website Builder for the Block Editor Default
unaffected
- Version
  0
  Status
  affected
  Constraints
  <=1.3.9

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor

Product

Default status

Versions

Themehunk

Vayu Blocks – Website Builder for the Block Editor

unaffected

Version	Status	Constraints
0	affected	<=1.3.9

Remediation

No remediation recorded yet.

Weaknesses (1)

CWE-79

Cross-site Scripting (XSS)

References (4)

Link	Providers	Tags
https://euvd.enisa.europa.eu/vulnerability/EUVD-2025-26491		Advisory
https://plugins.trac.wordpress.org/browser/vayu-blocks/tags/1.3.5/trunk/inc/render/lottie/lottie.php#L102
https://plugins.trac.wordpress.org/changeset/3351839/
https://www.wordfence.com/threat-intel/vulnerabilities/id/a92d53ab-9c59-4c9c-93e5-32dd05246249?source=cve