# CVE-2023-3591: Lack of previous password reset tokens on new token creation

> Attackers can reuse old password reset tokens to take over accounts because new token generation does not invalidate previous tokens.

- **Severity:** Medium 4.8 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 17 Jul 2023
- **Updated:** 21 Oct 2024
- **Also known as:** BIT-mattermost-2023-3591, GHSA-g328-hf66-x5p7

## What is CVE-2023-3591?

CVE-2023-3591 is a medium-severity vulnerability in Mattermost Mattermost Server, published on 17 Jul 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Mattermost fails to invalidate previously generated password reset tokens when a new reset token was created.

Weakness: CWE-287 (Improper Authentication)

## Which versions are affected by CVE-2023-3591?

1 open source package ship an affected version, including mattermost. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `mattermost` | Bitnami | From 7.8.0 | 7.8.7, 7.9.5, 7.10.3 |

Products: Mattermost Mattermost Server.

## How do I fix CVE-2023-3591?

Upgrade mattermost to a fixed version for your release line: 7.8.7, 7.9.5 or 7.10.3.

## Is CVE-2023-3591 being exploited?

There is no known exploitation of CVE-2023-3591 in the wild and no public exploit code.

## Other vulnerabilities in Mattermost Mattermost Server

- [CVE-2025-12419](https://insights.sbomify.com/CVE-2025-12419/): Account takeover on OAuth/OpenID-enabled servers (critical 9.9)
- [CVE-2025-12421](https://insights.sbomify.com/CVE-2025-12421/): Account Takeover via Code Exchange Endpoint (critical 9.9)
- [CVE-2025-4981](https://insights.sbomify.com/CVE-2025-4981/): Path Traversal Leading to RCE by Any Authenticated Mattermost User (critical 9.9)
- [CVE-2025-20051](https://insights.sbomify.com/CVE-2025-20051/): Arbitrary file read via block duplication in Mattermost Boards (critical 9.9)
- [CVE-2025-25279](https://insights.sbomify.com/CVE-2025-25279/): Arbitrary file read in Mattermost Boards via import & export board archive (critical 9.9)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-3591 and fix it if it is affected.

What it is: CVE-2023-3591 is a medium-severity vulnerability in Mattermost Mattermost Server, published on 17 Jul 2023. 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-2023-3591 in the wild and no public exploit code.

Affected packages and fixed versions:
- mattermost (Bitnami): affected from 7.8.0; fixed in 7.8.7, 7.9.5, 7.10.3

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-2023-3591/ (Markdown: https://insights.sbomify.com/CVE-2023-3591/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-3591
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-3591
- OSV: https://osv.dev/vulnerability/CVE-2023-3591

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-3591/
Summaries are generated and may contain mistakes; the official description above is the record.