CVE-2026-27998
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 Control of Filename for Include/Require Statement in PHP Program ('PHP Remote File Inclusion') vulnerability in ThemeREX Vixus vixus allows PHP Local File Inclusion.This issue affects Vixus: from n/a through <= 1.0.16.
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 confidenceA PHP Local File Inclusion vulnerability exists in ThemeREX Vixus theme versions 1.0.16 and below. The application improperly controls filenames used in include/require statements, allowing attackers to manipulate input parameters to include arbitrary local files from the server, potentially exposing sensitive data or achieving code execution.
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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Identify if ThemeREX Vixus theme is installedCheck your WordPress theme directory (wp-content/themes/vixus) for the theme files. Look for style.css with the theme name header.Affected if The vixus theme folder exists in your WordPress themes directory
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Check the installed version numberOpen the theme style.css file in wp-content/themes/vixus/ and locate the 'Version:' field in the theme header comment. Compare this version to 1.0.16.Affected if The version number in style.css is 1.0.16 or lower
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Identify if user-controllable file inclusion parameters existSearch theme PHP files for include, require, include_once, or require_once statements that use variables from $_GET, $_POST, or $_REQUEST without sanitization. Look for patterns like 'include($_GET[...])' or 'require($var)'.Affected if The theme code contains include/require statements using unsanitized user input parameters
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Check for the vulnerable parameter in HTTP requestsIf you have access to your web server logs, search for requests to the theme that contain parameters potentially used in file inclusion (e.g., 'file=', 'path=', 'page=', 'template=').Affected if HTTP requests to the site contain parameters that get passed to include/require functions in the theme code
You are affected if the ThemeREX Vixus theme version is 1.0.16 or lower and your theme code uses user-supplied input in include/require statements without validation.
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 dataImplement strict input validation with whitelist approach for file inclusion paths, avoid using user-supplied input directly in include/require statements, and validate that included files exist within allowed directories.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA4.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-27998 — 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-2026-27998 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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- Version or environment caveats, and links to real fixes
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