CVE-2026-4801 — Cross-Site Scripting (XSS)
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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 extern
What This Means For You
- If your environment is affected by CWE-79, review your exposure and prioritize patching based on your environment. Monitor vendor advisories for CVE-2026-4801 updates and patches.
Related ATT&CK Techniques
🛡️ Detection Rules
3 rules · 6 SIEM formats3 detection rules auto-generated for this incident, mapped to MITRE ATT&CK. Sigma YAML is free — export to any SIEM format via the Intel Bot.
WordPress Gutenberg Blocks CoBlocks Stored XSS via iCal Feed - Free Tier
Indicators of Compromise
| ID | Type | Indicator |
|---|---|---|
| CVE-2026-4801 | vulnerability | CVE-2026-4801 |
| CWE-79 | weakness | CWE-79 |
Written by SCW Vulnerability Desk
Source & Attribution
| Source Platform | NVD |
| Channel | National Vulnerability Database |
| Published | April 18, 2026 at 08:16 UTC |
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