# DRUPAL-CONTRIB-2021-006: The [SAML Authentication module](https://www.drupal.org/project/samlauth) allows users to authenticate against a SAML identity provider to l

> Attackers can bypass SAML authentication restrictions by using Drupal's password reset feature to log in as users blocked from the identity provider.

- **Severity:** Not scored
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** Yes
- **Published:** 28 Apr 2021

## What is DRUPAL-CONTRIB-2021-006?

DRUPAL-CONTRIB-2021-006 is an authentication bypass vulnerability in drupal/samlauth, published on 28 Apr 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

The [SAML Authentication module](https://www.drupal.org/project/samlauth) allows users to authenticate against a SAML identity provider to login to your Drupal site.

The module doesn't sufficiently protect against unauthorized local access, by way of using the 'password reset' facility, for users who are supposed to only be able to log in through the identity provider. This creates a scenario where after such a user is blocked from logging in through the identity provider but not explicitly blocked in Drupal, they are still able to log in by sending themselves a Drupal 'password reset' e-mail.

## Which versions are affected by DRUPAL-CONTRIB-2021-006?


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `drupal/samlauth` | Packagist:https://packages.drupal.org/8 | All versions | 3.1.0 |

## How do I fix DRUPAL-CONTRIB-2021-006?

Apply the vendor's patch.

## Is DRUPAL-CONTRIB-2021-006 being exploited?

There is no known exploitation of DRUPAL-CONTRIB-2021-006 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for DRUPAL-CONTRIB-2021-006 and fix it if it is affected.

What it is: DRUPAL-CONTRIB-2021-006 is an authentication bypass vulnerability in drupal/samlauth, published on 28 Apr 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of DRUPAL-CONTRIB-2021-006 in the wild and no public exploit code.

Affected product: drupal/samlauth. 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-2021-006/ (Markdown: https://insights.sbomify.com/DRUPAL-CONTRIB-2021-006/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/DRUPAL-CONTRIB-2021-006

---
From sbomify Insights: https://insights.sbomify.com/DRUPAL-CONTRIB-2021-006/
Summaries are generated and may contain mistakes; the official description above is the record.