CVE-2025-8487
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedThe Kubio AI Page Builder plugin for WordPress is vulnerable to unauthorized plugin installation due to a missing capability check on the kubio-image-hub-install-plugin AJAX action in all versions up to, and including, 2.6.3. This makes it possible for authenticated attackers, with Subscriber-level access and above, to install the Image Hub plugin.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · high confidenceThe Kubio AI Page Builder plugin lacks a capability check on the kubio-image-hub-install-plugin AJAX action, allowing any authenticated user with Subscriber-level privileges to trigger plugin installation. This is a Broken Access Control vulnerability where the AJAX endpoint does not verify the user has appropriate permissions before performing a privileged operation.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- Low
- Availability
- Low
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Identify the installed Kubio AI Page Builder versionIn WordPress admin, go to Plugins > Installed Plugins and find Kubio AI Page Builder. The version number is displayed there. Alternatively, check the plugin's main PHP file header or version constant.Affected if The installed version contains the vulnerable AJAX endpoint (compare against any version that includes the kubio-image-hub-install-plugin action)
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Locate the kubio-image-hub-install-plugin AJAX action handlerSearch the plugin files for 'kubio-image-hub-install-plugin' - typically in the main plugin file or an AJAX-related file. Look for add_action('wp_ajax_kubio-image-hub-install-plugin', ...)Affected if This AJAX action is registered and exists in the installed version
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Verify the capability check on the AJAX actionExamine the callback function for the AJAX action. Search for current_user_can() or similar permission checks within that function. Check if any capability requirement is defined before the installation logic runs.Affected if No capability check (or a weak check like 'edit_posts') exists before the plugin installation code executes
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Confirm the action is hooked without privilege elevationCheck if the AJAX action is hooked only to wp_ajax_ (requires auth) or also to wp_ajax_nopriv_ (allows unauthenticated). Look for add_action('wp_ajax_nopriv_kubio-image-hub-install-plugin') - if present, unauthenticated access is possible.Affected if The action is accessible to authenticated users with Subscriber role (or lower) without proper capability verification
A user is affected if the kubio-image-hub-install-plugin AJAX action exists in their Kubio AI Page Builder installation and lacks a capability check (such as current_user_can('manage_options')) before executing plugin installation logic.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataAdd a WordPress capability check (e.g., current_user_can('manage_options')) to the kubio-image-hub-install-plugin AJAX action and enforce proper nonce verification to prevent unauthorized plugin installation.
- Consultation2.0 h
- Implementation2.0 h
- Testing2.0 h
- Review / QA1.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2025-8487 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2025-8487 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
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