CVE-2026-27416
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 bPlugins PDF Poster allows Exploiting Incorrectly Configured Access Control Security Levels. This issue affects PDF Poster: from n/a through 2.4.1.
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 Missing Authorization vulnerability in the bPlugins PDF Poster WordPress plugin (versions up to 2.4.1). The vulnerability allows attackers to exploit incorrectly configured access control security levels, likely enabling unauthorized users to access sensitive functionality or perform actions without proper permission checks due to flawed access control configuration.
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
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- Low
- Integrity
- None
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/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.
-
Identify PDF Poster plugin versionNavigate to WordPress admin > Plugins > PDF Poster and read the version number displayed, or query the plugins API endpoint /wp-json/wp/v2/plugins?search=pdf-posterAffected if Installed version is 2.4.1 or any earlier version (versions up to and including 2.4.1 are affected)
-
Verify WordPress user roles presentGo to Users > All Users in WordPress admin and note which roles exist (Subscriber, Contributor, Author, Editor, Administrator)Affected if Any user role below Administrator exists on the site (unauthorized access by lower-privileged users is the attack vector)
-
Inspect plugin capabilities configurationCheck plugin source code files (typically in wp-content/plugins/pdf-poster/) for add_action calls registering AJAX handlers or REST routes, noting which WordPress capabilities or roles are requiredAffected if Plugin registers AJAX or REST endpoints without capability checks (e.g., missing current_user_can('manage_options') or similar authorization calls)
-
Test unauthorized endpoint accessUsing a lower-privileged account (e.g., Subscriber), attempt to access plugin admin functions via AJAX (wp-admin/admin-ajax.php?action=pdf_poster_*) or REST API routes (wp-json/pdf-poster/v1/*)Affected if Requests succeed without returning authorization errors (401/403), indicating the vulnerability is present and exploitable
If the plugin version is 2.4.1 or lower and sensitive plugin endpoints are accessible to users lacking admin capabilities, the environment is affected by this authorization flaw.
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 proper authorization checks on all sensitive actions and endpoints within the plugin, and ensure access control security levels are correctly configured according to WordPress capability requirements.
- Consultation3.0 h
- Implementation6.0 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 $3,984.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-27416 — 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-2026-27416 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
Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.
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