CVE-2025-13231
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 Fancy Product Designer plugin for WordPress is vulnerable to Server-Side Request Forgery in all versions up to, and including, 6.4.8. This is due to a time-of-check/time-of-use (TOCTOU) race condition in the 'url' parameter of the fpd_custom_uplod_file AJAX action. The plugin validates the URL by calling getimagesize() first, then later retrieves the same URL using file_get_contents(). This makes it possible for unauthenticated attackers to exploit the timing gap to perform SSRF attacks by serving a valid image during validation, then changing the response to redirect to arbitrary internal or external URLs during the actual fetch.
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 Fancy Product Designer WordPress plugin has a TOCTOU race condition vulnerability in the fpd_custom_uplod_file AJAX action. The plugin first validates URLs via getimagesize() to ensure they point to images, then later fetches content using file_get_contents(). Attackers can exploit the timing gap by serving a valid image during validation, then redirecting to arbitrary internal/external URLs during the actual fetch, enabling unauthenticated SSRF attacks.
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
- Low
- Integrity
- Low
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/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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Confirm Fancy Product Designer plugin is installedNavigate to WordPress admin > Plugins and verify 'Fancy Product Designer' appears in the installed plugins list, or check the plugin directory for fancy-product-designer folderAffected if The plugin is installed and active
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Identify the installed plugin versionIn WordPress admin > Plugins > Fancy Product Designer, click on the plugin name to view details, or read the version from the plugin header in wp-content/plugins/fancy-product-designer/fancy-product-designer.phpAffected if The version is lower than 6.4.9 (the patched version)
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Verify the vulnerable AJAX action is exposedCheck if the fpd_custom_uplod_file AJAX endpoint is accessible by reviewing the plugin PHP code for do_action('wp_ajax_fpd_custom_uplod_file') or do_action('wp_ajax_nopriv_fpd_custom_uplod_file') calls, or test by making a POST request to /wp-admin/admin-ajax.php with action=fpd_custom_uplod_fileAffected if The AJAX action is registered and accessible to unauthenticated users (wp_ajax_nopriv_ hook exists)
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Determine if external URL submissions are processedReview the fpd_custom_uplod_file AJAX handler function in the plugin code to see if it accepts and processes URL parameters, or test by submitting a request with an external URL in the upload parameterAffected if The AJAX handler accepts and processes URLs from user input without additional validation
You are affected if Fancy Product Designer is installed with a version lower than 6.4.9 AND the fpd_custom_uplod_file AJAX action is accessible and processes external URLs.
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 to version 6.4.9 or later which should contain the patch. Alternatively, disable the fpd_custom_uplod_file AJAX action or implement server-side filtering to block external URL submissions until the patch is available.
- Consultation2.0 h
- Implementation4.0 h
- Testing2.0 h
- Review / QA1.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2025-13231 — 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-2025-13231 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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