What is CVE-2026-4801?

CVE-2026-4801 is a medium-severity vulnerability in Godaddy Page Builder Gutenberg Blocks – Coblocks, classified under Cross-site Scripting. CVSS score: 6.4/10. Published 2026-04-18.

How severe is CVE-2026-4801?

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

XSS in Godaddy Page Builder Gutenberg Blocks – Coblocks

CVE-2026-4801

The Page Builder Gutenberg Blocks – CoBlocks plugin for WordPress is vulnerable to Stored Cross-Site Scripting via external iCal feed data in all versions up to, and including, 3.1.16 due to insufficient output escaping of event titles, descriptions, and locations fetched from external iCal feeds in the Events block rendering function. 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: 0.004 (33.3th 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

Godaddy Page Builder Gutenberg Blocks – Coblocks — versions 0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

Frequently asked questions

What is CVE-2026-4801?: CVE-2026-4801 is a medium-severity vulnerability in Godaddy Page Builder Gutenberg Blocks – Coblocks, classified under Cross-site Scripting. CVSS score: 6.4/10. Published 2026-04-18.
How severe is CVE-2026-4801?: Medium severity. CVSS v3 base score is 6.4 out of 10.