# CVE-2026-4801

> Vulnerability · severity: **MEDIUM** (CVSS 6.4).

## Description

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.

## Key facts

- **CVE ID:** CVE-2026-4801
- **Published:** 2026-04-18
- **CVSS severity:** MEDIUM
- **CVSS base score:** 6.4
- **CWE codes:** CWE-79

## Primary sources

- NIST NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-4801

## Citation

> AI Analytics. CVE-2026-4801. Retrieved 2026-07-09 from https://api.ai-analytics.org/cve/CVE-2026-4801. Derived from NIST NVD. Licensed CC0.

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