CVE-2026-2951 Cross-site scripting in Gutentor – Gutenberg Blocks – Page Builder for Gutenberg Editor
Authenticated contributors can inject arbitrary scripts into pages via the Gutentor plugin, leading to code execution when other users view the page.
- 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-2026-2951?
CVE-2026-2951 is a medium-severity cross-site scripting vulnerability in Gutentor – Gutenberg Blocks – Page Builder for Gutenberg Editor, published on 23 Apr 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
The Gutentor – Gutenberg Blocks – Page Builder for Gutenberg Editor plugin for WordPress is vulnerable to Stored Cross-Site Scripting in versions up to, and including, 3.5.5 due to insufficient input sanitization and output escaping. 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-2026-2951?
How do I fix CVE-2026-2951?
No fix has been published for CVE-2026-2951 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-2026-2951 being exploited?
There is no known exploitation of CVE-2026-2951 in the wild and no public exploit code.
Sources
Also known as GHSA-vrq9-2rh7-jjg5.