CVE-2025-31841
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 · uneditedMissing Authorization vulnerability in Frank P. Walentynowicz FPW Category Thumbnails fpw-category-thumbnails allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects FPW Category Thumbnails: from n/a through <= 1.9.5.
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 confidenceMissing authorization vulnerability in FPW Category Thumbnails WordPress plugin allows unauthenticated or unauthorized users to access functionality due to incorrectly configured access control security levels. The plugin fails to properly validate user permissions before executing certain actions, enabling privilege escalation or unauthorized administrative operations.
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
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- Low
- Integrity
- Low
- Availability
- Low
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/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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Identify if FPW Category Thumbnails plugin is installedIn WordPress admin, go to Plugins > Installed Plugins and look for 'FPW Category Thumbnails', or check the /wp-content/plugins/ directory for a folder named 'fpw-category-thumbnails' or similar. Check the plugin file header for the Version line.Affected if The plugin is installed and active.
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Determine the installed plugin versionIn WordPress admin Plugins page, find FPW Category Thumbnails and note the version number displayed below the plugin name. Alternatively, open the main plugin PHP file and look for the 'Version' header comment.Affected if The installed version is lower than the patched version (when available).
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Check for publicly accessible admin actionsExamine the plugin source code (in wp-content/plugins/) for AJAX handlers or admin action hooks that lack capability checks like 'manage_options' or 'edit_posts'. Look for 'add_action' calls on admin_init or wp_ajax hooks without preceding permission checks.Affected if The plugin contains admin actions or AJAX endpoints that do not verify user capabilities before executing.
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Test for unauthorized access to plugin functionalityAttempt to access plugin admin pages or trigger plugin actions while logged out as a subscriber-level or unauthenticated user. Check if HTTP requests to wp-admin/admin.php?page=fpw-category-thumbnails* or related URLs succeed without authentication.Affected if Unauthenticated or low-privilege users can access plugin administrative functions.
A user is affected if the FPW Category Thumbnails plugin is installed and its admin actions or endpoints can be accessed by unauthenticated or unauthorized users without proper WordPress capability checks.
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 version of FPW Category Thumbnails plugin when a patched release becomes available. Until then, restrict access to the affected plugin functionality via web server authentication or disable the plugin if not actively used.
- Consultation3.0 h
- Implementation6.0 h
- Testing3.0 h
- Review / QA3.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-31841 — 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-2025-31841 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
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