# CVE-2026-3649: Missing authorization in Katalogportal-pdf-sync Widget

> Authenticated users can access private PDF attachment details due to missing authorization checks in the plugin's AJAX handler.

- **Severity:** Medium 5.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 15 Apr 2026
- **Updated:** 15 Apr 2026
- **Also known as:** GHSA-m65x-5prm-5wf2

## What is CVE-2026-3649?

CVE-2026-3649 is a medium-severity missing authorization vulnerability in colbeinformatik Katalogportal-pdf-sync Widget, published on 15 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

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.

Weakness: CWE-862 (Missing Authorization)

## Which versions are affected by CVE-2026-3649?


## How do I fix CVE-2026-3649?

No fix has been published for CVE-2026-3649 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-3649 being exploited?

There is no known exploitation of CVE-2026-3649 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-3649 and fix it if it is affected.

What it is: CVE-2026-3649 is a medium-severity missing authorization vulnerability in colbeinformatik Katalogportal-pdf-sync Widget, published on 15 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-3649 in the wild and no public exploit code.

Affected product: colbeinformatik Katalogportal-pdf-sync Widget. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-3649/ (Markdown: https://insights.sbomify.com/CVE-2026-3649/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-3649
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-3649
- OSV: https://osv.dev/vulnerability/CVE-2026-3649

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-3649/
Summaries are generated and may contain mistakes; the official description above is the record.