CVE-2026-7465: Spectra Gutenberg Blocks <= 2.19.25 - Authenticated (Contributor+) Remote Code Execution via Arbitrary PHP Function Call via Block Attributes
The Spectra Gutenberg Blocks – Website Builder for the Block Editor plugin for WordPress is vulnerable to Remote Code Execution in all versions up to, and including, 2.19.25. This makes it possible for authenticated attackers, with Contributor-level access and above, to execute code on the server. Exploitation requires a two-block payload embedded in post content: the first block registers a fake uagb/-prefixed block type with an attacker-specified rendercallback, and the second block of the same fake type triggers invocation of that callback via calluserfunc() during sequential block rendering in the same page request.
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2026-7465?
The severity of CVE-2026-7465 is rated high, with a score of 8.8.
How can I fix CVE-2026-7465?
To fix CVE-2026-7465, update the Spectra Gutenberg Blocks plugin to the latest version beyond 2.19.25.
What type of vulnerability is CVE-2026-7465?
CVE-2026-7465 is a Remote Code Execution vulnerability affecting Spectra Gutenberg Blocks.
Who is affected by CVE-2026-7465?
Authenticated users with Contributor-level access and above are vulnerable to CVE-2026-7465.
What can attackers do with CVE-2026-7465?
Attackers can execute arbitrary PHP code on the server using CVE-2026-7465.