CVE-2025-4187
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 · uneditedThe UserPro - Community and User Profile WordPress Plugin plugin for WordPress is vulnerable to Directory Traversal in all versions up to, and including, 5.1.10 via the userpro_fbconnect() function. This makes it possible for unauthenticated attackers to read the contents of arbitrary files on the server, which can contain sensitive information.
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 confidenceThe UserPro WordPress plugin contains a directory traversal vulnerability in the userpro_fbconnect() function. The function fails to properly sanitize user-supplied input, allowing unauthenticated attackers to use path traversal sequences (such as ../) to access files outside the intended web root directory. This can expose sensitive server configuration files, credentials, or other confidential data.
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
- None
- Availability
- None
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
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 UserPro plugin is installedCheck the WordPress plugins directory or access WP Admin > Plugins to confirm UserPro is present and activeAffected if UserPro plugin is installed and active on the WordPress site
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Identify installed UserPro versionAccess WP Admin > Plugins > UserPro or inspect the plugin header in wp-content/plugins/userpro/includes/userpro.php to read the Version fieldAffected if The installed version matches or predates any known vulnerable version (no patched version is specified in the provided data)
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Confirm userpro_fbconnect endpoint is reachableCheck if the endpoint /?action=userpro_fbconnect or similar routing is accessible by attempting a request or inspecting WordPress rewrite rulesAffected if The userpro_fbconnect function endpoint is exposed and reachable without authentication
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Test for directory traversal vulnerabilitySend a crafted request to the affected endpoint using path traversal sequences such as ../../../../../../etc/passwd or ../../wp-config.php in a parameter that the userpro_fbconnect function processesAffected if The application returns file contents from outside the web root, indicating the traversal is not sanitized
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Review access logs for exploitation attemptsInspect web server access logs (Apache/nginx) for patterns containing ../ in requests to userpro_fbconnect or related endpointsAffected if Suspicious traversal patterns appear in logs, suggesting attempted or successful exploitation
A user is affected if the UserPro plugin is installed with an unpatched version and the userpro_fbconnect endpoint is exposed without proper input sanitization preventing directory traversal.
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 to a patched version of the UserPro plugin (if available) and implement input validation to reject directory traversal sequences in file path parameters. Until a patch is available, consider restricting access to the affected endpoint via web server configuration.
- Consultation2.0 h
- Implementation4.0 h
- Testing3.0 h
- Review / QA2.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2025-4187 — 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-2025-4187 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
- No spam, self-promotion, credentials, or personal data