# GHSA-6pq8-67pw-j6hw: Time-Based Information Disclosure Vulnerability in Flow

> Attackers can determine if user accounts exist by measuring response times during login attempts due to conditional password hashing.

- **Severity:** Not scored
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 17 May 2024

## What is GHSA-6pq8-67pw-j6hw?

GHSA-6pq8-67pw-j6hw is a vulnerability in neos/flow, published on 17 May 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The PersistedUsernamePasswordProvider was prone to a information disclosure of account existance based on timing attacks as the hashing of passwords was only done in case an account was found. We changed the core so that the provider always does a password comparison in case credentials were submitted at all.

## Which versions are affected by GHSA-6pq8-67pw-j6hw?

10 open source packages ship an affected version, including neos/flow.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `neos/flow` | Packagist | From 2.3.0 | 2.3.16 |
| `neos/flow` | Packagist | From 2.3.0 | 2.3.16 |
| `neos/flow` | Packagist | From 3.0.0 | 3.0.10 |
| `neos/flow` | Packagist | From 3.0.0 | 3.0.10 |
| `neos/flow` | Packagist | From 3.1.0 | 3.1.7 |
| `neos/flow` | Packagist | From 3.1.0 | 3.1.7 |
| `neos/flow` | Packagist | From 3.2.0 | 3.2.7 |
| `neos/flow` | Packagist | From 3.2.0 | 3.2.7 |
| `neos/flow` | Packagist | From 3.3.0 | 3.3.5 |
| `neos/flow` | Packagist | From 3.3.0 | 3.3.5 |

## How do I fix GHSA-6pq8-67pw-j6hw?

Upgrade neos/flow to a fixed version for your release line: 2.3.16, 3.0.10, 3.1.7 or 3.2.7.

## Is GHSA-6pq8-67pw-j6hw being exploited?

There is no known exploitation of GHSA-6pq8-67pw-j6hw in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for GHSA-6pq8-67pw-j6hw and fix it if it is affected.

What it is: GHSA-6pq8-67pw-j6hw is a vulnerability in neos/flow, published on 17 May 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of GHSA-6pq8-67pw-j6hw in the wild and no public exploit code.

Affected packages and fixed versions:
- neos/flow (Packagist): affected from 2.3.0; fixed in 2.3.16
- neos/flow (Packagist): affected from 2.3.0; fixed in 2.3.16
- neos/flow (Packagist): affected from 3.0.0; fixed in 3.0.10
- neos/flow (Packagist): affected from 3.0.0; fixed in 3.0.10
- neos/flow (Packagist): affected from 3.1.0; fixed in 3.1.7
- neos/flow (Packagist): affected from 3.1.0; fixed in 3.1.7
- neos/flow (Packagist): affected from 3.2.0; fixed in 3.2.7
- neos/flow (Packagist): affected from 3.2.0; fixed in 3.2.7
- neos/flow (Packagist): affected from 3.3.0; fixed in 3.3.5
- neos/flow (Packagist): affected from 3.3.0; fixed in 3.3.5

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-6pq8-67pw-j6hw/ (Markdown: https://insights.sbomify.com/GHSA-6pq8-67pw-j6hw/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/GHSA-6pq8-67pw-j6hw

---
From sbomify Insights: https://insights.sbomify.com/GHSA-6pq8-67pw-j6hw/
Summaries are generated and may contain mistakes; the official description above is the record.