dbcve.org
Missing AuthorizationWeakness · CWE-862

CVE-2026-3649

MEDIUM · 5.3 CVSS v3.1 Published 2026-04-15
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
62/100
Remediation priority · Elevated
Remotely reachable No privileges Zero-click

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 · unedited
The Katalogportal PDF Sync plugin for WordPress is vulnerable to Missing Authorization in all versions up to and including 1.0.0. The katalogportal_popup_shortcode() function is registered as an AJAX handler via wp_ajax_katalogportal_shortcodePrinter but lacks any capability check (current_user_can()) or nonce verification. This allows any authenticated user, including Subscribers, to call the endpoint and retrieve a list of all synchronized PDF attachments (including those attached to private or draft posts) along with their titles, actual filenames, and the katalogportal_userid configuration value. The WP_Query uses post_status => 'any' which returns attachments regardless of the parent post's visibility status.

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 confidence

The Katalogportal PDF Sync WordPress plugin has a missing authorization vulnerability in its AJAX handler (wp_ajax_katalogportal_shortcodePrinter). The katalogportal_popup_shortcode() function lacks both capability checks and nonce verification, allowing any authenticated user—including low-privilege Subscribers—to access the endpoint and retrieve metadata (titles, filenames, katalogportal_userid) for all synchronized PDF attachments, including those attached to private or draft posts.

MitigationAdd a capability check (e.g., current_user_can('edit_posts')) and nonce verification to the AJAX handler, and modify the WP_Query to filter by post_status => 'publish' instead of 'any' to prevent exposure of non-public attachments.

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 checks

Work through these to decide whether this CVE applies to you.

  1. Verify Katalogportal PDF Sync plugin is installed
    Check WordPress plugins directory for 'katalogportal-pdf-sync' folder, or query the wp_plugins table for the plugin slug
    Affected if Plugin is present and active in the WordPress installation
  2. Confirm installed plugin version
    Read the plugin main file header (e.g., katalogportal-pdf-sync.php) and extract the Version field, then compare against any known vulnerable versions
    Affected if Version is within a range that lacks the authorization fix
  3. Inspect AJAX handler code for capability checks
    Locate the file containing katalogportal_popup_shortcode() function (typically in the plugin's main PHP file) and search for current_user_can() or similar capability checks before the WP_Query logic
    Affected if No capability check (current_user_can) is found before the query that fetches attachments
  4. Inspect AJAX handler code for nonce verification
    Search the same AJAX handler function for wp_verify_nonce() or check_ajax_referer() calls
    Affected if No nonce verification is present in the wp_ajax_katalogportal_shortcodePrinter handler
  5. Check if low-privilege users can trigger the endpoint
    As a Subscriber-level user, make a POST request to /wp-admin/admin-ajax.php with action=katalogportal_shortcodePrinter and observe if the response contains metadata for attachments
    Affected if Request succeeds and returns PDF metadata including titles and filenames without access denial

A user is affected if the Katalogportal PDF Sync plugin is installed AND its AJAX handler lacks both capability checks and nonce verification, allowing any logged-in user to retrieve metadata from private or draft post attachments.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

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.

dbcve · scoped
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Add a capability check (e.g., current_user_can('edit_posts')) and nonce verification to the AJAX handler, and modify the WP_Query to filter by post_status => 'publish' instead of 'any' to prevent exposure of non-public attachments.

Recommended fix Moderate confidence

Latest version of Katalogportal PDF Sync plugin beyond 1.0.0

  1. Check if a newer version of the Katalogportal PDF Sync plugin is available in the WordPress plugin repository
  2. If a version newer than 1.0.0 is available, navigate to Dashboard > Plugins and update the plugin to the latest version
  3. Verify the update was successful by confirming the new version number
  4. Test that the AJAX endpoint wp_ajax_katalogportal_shortcodePrinter now properly enforces authorization (only users with appropriate capabilities should be able to access it)

Generated from the published advisory — verify against the referenced sources before acting.

Have this fixed Scoped from the published advisory
  • Consultation1.0 h
  • Implementation2.0 h
  • Testing2.0 h
  • Review / QA1.0 h
6.0 hours of engineering $1,040
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2026-3649 in production — separate from our analysis above.

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What this is

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.

What belongs here
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  • Version or environment caveats, and links to real fixes
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