CVE-2026-28091
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 Coleo coleo allows PHP Local File Inclusion.This issue affects Coleo: from n/a through <= 1.1.7.
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 confidenceThis is a PHP Local File Inclusion (LFI) vulnerability in the ThemeREX Coleo theme (versions up to 1.1.7). The vulnerability stems from improper control of filename parameters in PHP include/require statements, allowing attackers to manipulate file paths to include arbitrary local PHP files, potentially leading to remote 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 Coleo theme is presentLocate PHP theme files named 'Coleo' or 'coelo' in your web server's theme directory (commonly wp-content/themes/). Check for a style.css file containing 'Theme Name: Coleo' or 'ThemeREX' branding.Affected if The Coleo theme files exist in the environment
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Determine the installed Coleo theme versionOpen the theme's style.css file (wp-content/themes/[coelo-folder]/style.css) and locate the 'Version:' header in the CSS comment block at the top. Compare this version number against any known affected version ranges for this CVE.Affected if The installed version falls within the affected version range for this vulnerability
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Search for vulnerable include/require patternsGrep or search through all PHP files in the theme directory for patterns like 'include($_', 'require($_', 'include_once($_', 'require_once($_' where the variable is not validated with allowlist checks before use.Affected if PHP files contain include/require statements using raw user input variables without validation
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Inspect the vulnerable code for filename parameter usageExamine the identified include/require statements in detail. Check if the variable used (e.g., $_GET['filename'], $_POST['file']) is passed directly to include/require without sanitization, allowlisting, or path traversal checks.Affected if The filename parameter is used directly in include/require without input validation or allowlist checks
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Verify web accessibility of vulnerable pathsDetermine if the PHP files containing the vulnerable code are accessible via HTTP/HTTPS requests to the web server. Test if the vulnerable parameter can be manipulated through URL parameters.Affected if The vulnerable PHP files are web-accessible and the parameter can be supplied via HTTP requests
You are affected if the Coleo theme is installed, contains include/require statements using unvalidated user-supplied filename parameters, and those scripts are accessible via the web server.
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 to the latest patched version of the ThemeREX Coleo theme. If no patch is available, audit and harden all include/require statements to use whitelist validation and disable allow_url_include in PHP configuration.
- Consultation2.0 h
- Implementation4.0 h
- Testing2.0 h
- Review / QA1.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-28091 — 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-2026-28091 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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