# GHSA-qcqv-38jg-2r43: Pageflow vulnerable to insecure direct object reference in membership update endpoint

> Attackers with manager roles can modify membership associations to compromise other accounts via insecure direct object reference.

- **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:** 15 Sep 2022

## What is GHSA-qcqv-38jg-2r43?

GHSA-qcqv-38jg-2r43 is a missing authorization vulnerability in pageflow, published on 15 Sep 2022. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

### Impact

Pageflow has a membership edit feature which allows users to edit the roles of user memberships associated with an account that they have the `manager` role to (including their own). While the `Entity` dropdown select field is greyed out in the UI, an attacker can use tools which allow sending arbitrary HTTP request to craft a request to the `/admin/users/{user_id}/memberships/{membership_id}` endpoint containing an additional `membership[entity_id]` parameter. This parameter is honored when the membership is updated, allowing an attacker to update the membership object associated with their own account (with `manager` role) to be associated with a different attacker-chosen account instead. Since `account_id`s are enumerable, an attacker can compromise all accounts present on the platform.

### Mitigation

Upgrade to version 15.7.1 or 14.5.2 of the `pageflow` gem.

### For more information

If you have any questions or comments about this advisory email us at info(at)codevise.de 

### Credits

[Positive Security](https://positive.security/)

## Which versions are affected by GHSA-qcqv-38jg-2r43?

4 open source packages ship an affected version, including pageflow.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `pageflow` | RubyGems | All versions | 14.5.2 |
| `pageflow` | RubyGems | All versions | 14.5.2 |
| `pageflow` | RubyGems | From 15.0.0 | 15.7.1 |
| `pageflow` | RubyGems | From 15.0.0 | 15.7.1 |

## How do I fix GHSA-qcqv-38jg-2r43?

Upgrade pageflow to a fixed version for your release line: 14.5.2 or 15.7.1.

## Is GHSA-qcqv-38jg-2r43 being exploited?

There is no known exploitation of GHSA-qcqv-38jg-2r43 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for GHSA-qcqv-38jg-2r43 and fix it if it is affected.

What it is: GHSA-qcqv-38jg-2r43 is a missing authorization vulnerability in pageflow, published on 15 Sep 2022. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of GHSA-qcqv-38jg-2r43 in the wild and no public exploit code.

Affected packages and fixed versions:
- pageflow (RubyGems): affected all versions; fixed in 14.5.2
- pageflow (RubyGems): affected all versions; fixed in 14.5.2
- pageflow (RubyGems): affected from 15.0.0; fixed in 15.7.1
- pageflow (RubyGems): affected from 15.0.0; fixed in 15.7.1

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/GHSA-qcqv-38jg-2r43/ (Markdown: https://insights.sbomify.com/GHSA-qcqv-38jg-2r43/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/GHSA-qcqv-38jg-2r43

---
From sbomify Insights: https://insights.sbomify.com/GHSA-qcqv-38jg-2r43/
Summaries are generated and may contain mistakes; the official description above is the record.