CVE-2023-48273
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 · uneditedMissing Authorization vulnerability in WP OnlineSupport, Essential Plugin Preloader for Website.This issue affects Preloader for Website: from n/a through 1.2.2.
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 · moderate confidenceThis is a Missing Authorization vulnerability in the Preloader for Website WordPress plugin. The plugin fails to properly enforce authorization checks on certain actions or endpoints, potentially allowing unauthenticated or lower-privileged users to access functionality they should not be able to reach.
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
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- Low
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
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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Check installed plugin versionNavigate to Plugins > Installed Plugins in the WordPress admin dashboard and locate the 'Preloader for Website' plugin. Note the version number displayed. Alternatively, open the main plugin PHP file (typically preloader-for-website.php or similar) and read the Version field in the plugin header comment.Affected if The installed version is older than the version that includes the fix for CVE-2023-48273 (compare against the patched version listed on the WordPress plugin repository or CVE advisory).
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Identify AJAX endpoint registrationsOpen the main plugin PHP file(s) and search for add_action calls containing 'wp_ajax_' strings. Specifically look for add_action('wp_ajax_nopriv_...') which registers endpoints accessible to unauthenticated users, and add_action('wp_ajax_...') for authenticated user endpoints.Affected if The plugin registers AJAX endpoints via wp_ajax_nopriv_ hooks that perform sensitive operations (such as saving settings, modifying content, or accessing admin functions) without verifying user capabilities or validating nonces.
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Review admin action handlers for capability checksSearch the plugin PHP files for action hooks related to admin operations, such as admin_init, admin_post, or custom admin AJAX handlers. Examine each handler function to determine if it includes current_user_can(), check_admin_referer(), or wp_verify_nonce() before executing privileged actions.Affected if Admin action handlers or AJAX callbacks lack proper authorization checks (like current_user_can() with appropriate capability requirements) and nonce verification before processing requests.
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Test unauthenticated access to plugin functionalityIf you have access to a staging or test environment, attempt to access plugin AJAX endpoints or admin actions directly via HTTP requests while logged out (or as a low-privilege user). Check if the plugin returns success responses or allows actions that should require administrator privileges.Affected if Unauthenticated requests or requests from subscriber-level users successfully execute actions that should be restricted to administrators, indicating the authorization bypass is present.
Your environment is affected if the Preloader for Website plugin version is older than the patched version AND the plugin contains AJAX endpoints or admin action handlers accessible without proper capability checks or nonce validation.
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 dataUpdate the plugin to the latest version once available, and review the plugin code to identify and remediate any AJAX endpoints or admin actions lacking proper capability checks and nonce verification.
- Consultation2.0 h
- Implementation3.0 h
- Testing2.0 h
- Review / QA1.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $2,272.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2023-48273 — 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-2023-48273 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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