CVE-2026-39495
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 · uneditedImproper Neutralization of Special Elements used in an SQL Command ('SQL Injection') vulnerability in NSquared Simply Schedule Appointments simply-schedule-appointments allows Blind SQL Injection.This issue affects Simply Schedule Appointments: from n/a through <= 1.6.9.27.
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 confidenceThis is a blind SQL injection vulnerability in the Simply Schedule Appointments WordPress plugin. Attackers can inject malicious SQL queries through unsanitized input parameters, allowing them to infer database information through application behavior changes rather than direct output.
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
- Changed
- Confidentiality
- High
- Integrity
- None
- Availability
- Low
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/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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Check installed plugin versionNavigate to WordPress admin > Plugins > Simply Schedule Appointments and note the version number displayed, or use WP-CLI: wp plugin list --name='simply-schedule-appointments'Affected if Version is 1.6.9.27 or earlier
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Identify vulnerable SQL injection entry pointReview the plugin settings and any public-facing forms or REST API endpoints it exposes. The vulnerability involves unsanitized user input in a parameter that gets used in SQL queries.Affected if The plugin exposes any user-facing input fields or API endpoints that accept parameters without sanitization
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Check for anomalous database query patternsEnable WordPress debug logging (wp-config.php: define('WP_DEBUG', true); define('WP_DEBUG_LOG', true);) and monitor the debug.log for SQL errors or unusual query patterns when using the plugin.Affected if SQL errors or suspicious query patterns appear in debug logs after plugin interaction
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Review access controls on vulnerable endpointsTest whether unauthenticated users can access the plugin's REST API endpoints or ajax handlers that process user input. Use browser developer tools or curl to examine HTTP requests the plugin makes.Affected if Unauthenticated access to input-handling endpoints is possible
You are affected if Simply Schedule Appointments version 1.6.9.27 or earlier is installed AND the plugin's user input endpoints (forms, REST API, or ajax handlers) are accessible, allowing unsanitized parameters to reach SQL queries.
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 dataUpgrade the Simply Schedule Appointments plugin to a version beyond 1.6.9.27. If immediate patching is not possible, implement input validation and consider deploying a WAF to filter SQL injection attempts.
- 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-2026-39495 — 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-2026-39495 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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