CVE-2026-3327 Authenticated DatoCMS Web Previews Plugin Iframe Injection
Authenticated users can inject iframes to load arbitrary external resources, bypassing frontend URL restrictions in the DatoCMS Web Previews plugin.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-3327?
CVE-2026-3327 is a medium-severity cross-site scripting vulnerability in DatoCMS Web Previews, published on 27 Feb 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
Authenticated Iframe Injection in Dato CMS Web Previews plugin. This vulnerability permits a malicious authenticated user to circumvent the restriction enforced on the configured frontend URL, enabling the loading of arbitrary external resources or origins. This issue affects Web Previews < v1.0.31.
Weakness: CWE-79
Which versions are affected by CVE-2026-3327?
How do I fix CVE-2026-3327?
No fix has been published for CVE-2026-3327 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-2026-3327 being exploited?
There is no known exploitation of CVE-2026-3327 in the wild and no public exploit code.
Sources
Also known as GHSA-x8p2-g6vv-f5mr.