What is CVE-2025-9378?

CVE-2025-9378 is a medium-severity vulnerability in Themehunk Vayu Blocks – Website Builder For The Block Editor, classified under Cross-site Scripting. CVSS score: 6.4/10. Published 2025-09-03.

How severe is CVE-2025-9378?

Medium severity. CVSS v3 base score is 6.4 out of 10.

Is CVE-2025-9378 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XSS in Themehunk Vayu Blocks – Website Builder For The Block Editor

CVE-2025-9378

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.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.002 (12.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N.

Affected products

Themehunk Vayu Blocks – Website Builder For The Block Editor — versions 0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

fkie-cad/nvd-json-data-feeds

References

Frequently asked questions

What is CVE-2025-9378?: CVE-2025-9378 is a medium-severity vulnerability in Themehunk Vayu Blocks – Website Builder For The Block Editor, classified under Cross-site Scripting. CVSS score: 6.4/10. Published 2025-09-03.
How severe is CVE-2025-9378?: Medium severity. CVSS v3 base score is 6.4 out of 10.
Is CVE-2025-9378 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.