CVE-2026-56036
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 · uneditedUnauthenticated SQL Injection in 워드프레스 결제 심플페이 <= 5.5.6 versions.
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 confidenceUnauthenticated SQL Injection vulnerability in WordPress SimplePay payment plugin version 5.5.6 and below. Attackers can inject malicious SQL queries without any authentication, potentially allowing unauthorized database access, data exfiltration, or complete system compromise.
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
- Changed
- Confidentiality
- High
- Integrity
- None
- Availability
- Low
CVSS:3.1/AV:N/AC:L/PR:N/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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Verify SimplePay plugin is installedNavigate to WordPress admin > Plugins or check the /wp-content/plugins/ directory for a 'simplepay' or '워드프레스-결제-심플페이' folderAffected if SimplePay plugin folder exists in the WordPress plugins directory
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Check installed SimplePay versionIn WordPress admin, go to Plugins > Installed Plugins > SimplePay and read the version number from the plugin descriptionAffected if Version displayed is 5.5.6 or any version lower than 5.5.6
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Confirm plugin is active statusOn the WordPress Plugins page, verify if SimplePay shows an 'Active' status rather than 'Inactive'Affected if Plugin status is Active
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Inspect server logs for SQL injection indicatorsReview web server access logs (Apache, Nginx, or Litespeed) for requests to SimplePay endpoints containing SQL syntax patterns such as UNION, SELECT, OR 1=1, or single quotes in parametersAffected if Log entries contain SQL injection payloads targeting SimplePay endpoints
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Check database for unauthorized changesQuery WordPress database tables (especially wp_users and wp_options) for suspicious admin accounts, unexpected plugin settings changes, or modified payment recordsAffected if Unexpected database records, new admin users, or altered plugin configurations are found
If SimplePay plugin version 5.5.6 or below is installed and active in WordPress, the environment is affected by this unauthenticated SQL injection vulnerability
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 SimplePay plugin to a version newer than 5.5.6. If no patched version is available, disable the plugin temporarily and implement WAF rules to block SQL injection attempts until a vendor fix is released.
- Consultation2.0 h
- Implementation1.0 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 $1,696.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-56036 — 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-2026-56036 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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A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- 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