CVE-2026-4801 Cross-site scripting in Page Builder Gutenberg Blocks – CoBlocks
Authenticated attackers can inject arbitrary scripts via external iCal feed data in the CoBlocks WordPress plugin, affecting users who view the page.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-4801?
CVE-2026-4801 is a medium-severity cross-site scripting vulnerability in godaddy Page Builder Gutenberg Blocks – CoBlocks, published on 18 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-79
Which versions are affected by CVE-2026-4801?
How do I fix CVE-2026-4801?
No fix has been published for CVE-2026-4801 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-4801 being exploited?
There is no known exploitation of CVE-2026-4801 in the wild and no public exploit code.
Sources
Also known as GHSA-7m2j-268v-rc6r.