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CVE-2024-11080 – Unauthenticated Hook Injection – Post Grid and Gutenberg Blocks – ComboBlocks (Word

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Summary

CVE-2024-11080 is a critical unauthenticated hook injection vulnerability (CWE-94, Improper Control of Generation of Code) in the "Post Grid and Gutenberg Blocks – ComboBlocks" WordPress plugin by pickplugins, affecting versions 2.2.85 through 2.3.32. The flaw resides in multiple functions within the plugin’s form-wrap component and allows unauthenticated attackers to trigger WordPress action hooks directly, without any prior security controls, authentication, or user interaction. The vulnerability carries a CVSS v3.1 base score of 9.8 (Critical).

Technical details

  • Root cause: Several functions in ~/includes/blocks/form-wrap/functions.php (identified at lines 116, 262, and 3249 of the plugin source) execute WordPress hooks based on unvalidated, attacker-supplied input, without verifying that the caller is authenticated or authorized.
  • Trigger conditions: An attacker can invoke the vulnerable form-wrap functionality remotely on any site running an affected version of the plugin, causing the plugin to fire arbitrary registered WordPress action hooks that the plugin (or other installed plugins/themes) exposes — no login, nonce, or special privileges are required.
  • Attack vector: Network-based (AV:N); low attack complexity (AC:L); no privileges required (PR:N); no user interaction (UI:N).
  • Impact: Because the impact depends on which hooks are registered on a given site, exploitation "grants" the attacker the ability to execute whatever actions those hooks perform — which, on sites with additional plugins registering sensitive hooks, can escalate to full confidentiality, integrity, and availability compromise, consistent with the CVSS impact subscores of C:H/I:H/A:H.

Affected software

  • Product: Post Grid and Gutenberg Blocks – ComboBlocks (WordPress plugin, vendor: pickplugins)
  • Versions: 2.2.85 up to and including 2.3.32

Severity

  • CVSS v3.1 Base Score: 9.8 (Critical)
  • Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Mitigation and recommended actions

  • Immediate: Check the installed plugin version. As of this advisory’s publication, the latest publicly released version available via the WordPress.org plugin repository is 2.3.24 — still within the affected range (2.2.85–2.3.32) — so security teams should monitor the plugin’s official changelog and update to a patched release as soon as the vendor publishes one.
  • If no patch is available: Until a fixed version is released, consider deactivating or removing the "Post Grid and Gutenberg Blocks – ComboBlocks" plugin on internet-facing WordPress sites, or restrict/block external access to the plugin’s form-wrap endpoints at the web server or WAF layer.
  • General hardening: Audit installed WordPress plugins for unused or unnecessary hook-exposing functionality, and ensure a Web Application Firewall is in place to detect anomalous unauthenticated requests targeting plugin form-handling endpoints.

References

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