CVE-2026-3396
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 · uneditedWCAPF – WooCommerce Ajax Product Filter plugin is vulnerable to time-based SQL Injection via the 'post-author' parameter in all versions up to, and including, 4.2.3 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for unauthenticated attackers to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database.
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 WCAPF – WooCommerce Ajax Product Filter plugin up to version 4.2.3 contains a time-based SQL injection vulnerability in the 'post-author' parameter. Due to insufficient escaping of user-supplied input and lack of prepared statements in the SQL query, unauthenticated attackers can inject arbitrary SQL queries to extract sensitive data from the database.
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
- High
- Integrity
- None
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/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 WCAPF plugin is installed and activeCheck WordPress plugin directory or admin panel for 'WCAPF WooCommerce Ajax Product Filter' plugin statusAffected if Plugin is installed and active in WordPress
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Identify installed plugin versionView plugin details in WordPress admin under Plugins > Installed Plugins, or inspect plugin header in wp-content/plugins/wcapf-ajax-product-filter/wcapf-ajax-product-filter.phpAffected if Version is 4.2.3 or earlier (vulnerable versions)
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Determine if post-author filter is configuredReview filter settings in plugin admin panel under Product Filters, or inspect site for frontend filter forms using the post-author parameterAffected if Any filter using the 'post-author' parameter is active on the site
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Verify parameter is reachable externallyConfirm the plugin filter endpoint is accessible without authentication (the vulnerability affects unauthenticated requests to the post-author parameter)Affected if Site allows unauthenticated access to filter functionality using post-author parameter
User is affected if the WCAPF plugin versions 4.2.3 or earlier are installed and active with any post-author filter configured on the site.
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 WCAPF plugin to the latest version immediately. If a patch is not yet available, disable the plugin or implement a WAF rule to block SQL injection attempts targeting the 'post-author' parameter until a patched version is released.
- Consultation1.0 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 $1,952.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-3396 — 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-2026-3396 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
- No spam, self-promotion, credentials, or personal data