# DRUPAL-CONTRIB-2018-081: This module provides a JSON:API specification-compliant HTTP API for accessing and manipulating Drupal content and configuration entities.

> An attacker with low privileges can bypass access controls to read restricted Drupal content via filtered JSON:API GET requests.

- **Severity:** Not scored
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 19 Dec 2018

## What is DRUPAL-CONTRIB-2018-081?

DRUPAL-CONTRIB-2018-081 is a missing authorization vulnerability in drupal/jsonapi, published on 19 Dec 2018. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

This module provides a JSON:API specification-compliant HTTP API for accessing and manipulating Drupal content and configuration entities.

The module doesn't sufficiently check access when responding to certain filtered collection requests, thereby causing an access bypass vulnerability. (This means certain `GET` requests are vulnerable; no `POST`, `PATCH` or `DELETE` requests are vulnerable.)

In order to fix this issue, two new hooks were added: `hook_jsonapi_ENTITY_TYPE_filter_access()` and `hook_jsonapi_entity_field_filter_access()`. Sites with custom entity types and/or with entity or field access customizations may need to implement these newly introduced hooks.

## Which versions are affected by DRUPAL-CONTRIB-2018-081?


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `drupal/jsonapi` | Packagist:https://packages.drupal.org/8 | All versions | 1.24.0 |

## How do I fix DRUPAL-CONTRIB-2018-081?

Apply the vendor's patch.

## Is DRUPAL-CONTRIB-2018-081 being exploited?

There is no known exploitation of DRUPAL-CONTRIB-2018-081 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for DRUPAL-CONTRIB-2018-081 and fix it if it is affected.

What it is: DRUPAL-CONTRIB-2018-081 is a missing authorization vulnerability in drupal/jsonapi, published on 19 Dec 2018. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of DRUPAL-CONTRIB-2018-081 in the wild and no public exploit code.

Affected product: drupal/jsonapi. 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/DRUPAL-CONTRIB-2018-081/ (Markdown: https://insights.sbomify.com/DRUPAL-CONTRIB-2018-081/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/DRUPAL-CONTRIB-2018-081

---
From sbomify Insights: https://insights.sbomify.com/DRUPAL-CONTRIB-2018-081/
Summaries are generated and may contain mistakes; the official description above is the record.