CVE-2026-39568
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 Local File Inclusion in Mr. SEO <= 2.0 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 Local File Inclusion vulnerability in Mr. SEO WordPress plugin versions 2.0 and below allows remote attackers to read sensitive files on the server by manipulating the include/require statements in the vulnerable parameter.
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
- High
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
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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Locate Mr. SEO plugin installation directoryNavigate to wp-content/plugins/ directory on the WordPress server and identify the mr-seo or mrseo plugin folderAffected if The mrseo plugin folder exists in wp-content/plugins/
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Determine installed plugin versionOpen the main plugin PHP file (usually mrseo.php or index.php) and locate the 'Version:' comment in the file header, or check the WordPress Plugins admin pageAffected if The reported version is 2.0 or lower (e.g., 2.0, 1.9, 1.8, etc.)
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Identify PHP files with file inclusion functionsSearch the plugin directory for files containing 'include', 'require', 'include_once', or 'require_once' statements that use variables or parameters without proper sanitizationAffected if The plugin contains PHP files that use dynamic file inclusion with unsanitized user input (e.g., include($_GET['page']) or require $file)
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Verify unauthenticated access to vulnerable parameterTest if the file inclusion parameter is accessible without authentication by attempting a request to the suspected vulnerable endpoint without logging inAffected if The file inclusion functionality is reachable without authentication (no login or capability check required)
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Inspect the vulnerable parameter handlingExamine the PHP code handling the file inclusion parameter to confirm it allows path traversal (e.g., ../../../../etc/passwd) without sanitizationAffected if The parameter accepts directory traversal sequences and passes them directly to include/require functions without validation
You are affected if Mr. SEO plugin version 2.0 or below is installed and the plugin contains unauthenticated file inclusion endpoints that accept unsanitized user input.
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 Mr. SEO plugin to a version newer than 2.0, or implement input validation and proper path sanitization on file inclusion functions until a patch is available.
- Consultation2.0 h
- Implementation4.0 h
- Testing3.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,088.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-39568 — 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-2026-39568 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