# CVE-2023-2473: Dreamer CMS Password Hash Calculation UserController.java updatePwd algorithmic complexity

> Remote attackers can cause denial of service in Dreamer CMS by exploiting inefficient password hash calculation complexity.

- **Severity:** Medium 4.3 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 2 May 2023
- **Updated:** 30 Jan 2025
- **Also known as:** GHSA-q4c2-wh8v-28q5

## What is CVE-2023-2473?

CVE-2023-2473 is a medium-severity denial of service vulnerability in Dreamer CMS, published on 2 May 2023. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A vulnerability was found in Dreamer CMS up to 4.1.3. It has been declared as problematic. This vulnerability affects the function updatePwd of the file UserController.java of the component Password Hash Calculation. The manipulation leads to inefficient algorithmic complexity. The attack can be initiated remotely. It is recommended to upgrade the affected component. The identifier of this vulnerability is VDB-227860.

Weakness: CWE-407 (Inefficient Algorithmic Complexity)

## Which versions are affected by CVE-2023-2473?

It affects 1 product.


Products: Iteachyou Dreamer Cms.

## How do I fix CVE-2023-2473?

No fix has been published for CVE-2023-2473 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-2473 being exploited?

There is no known exploitation of CVE-2023-2473 in the wild and no public exploit code.

## Other vulnerabilities in Dreamer CMS

- [CVE-2023-42279](https://insights.sbomify.com/CVE-2023-42279/): SQL injection in n/a (critical 9.8)
- [CVE-2021-43084](https://insights.sbomify.com/CVE-2021-43084/): SQL injection in n/a (critical 9.8)
- [CVE-2023-46886](https://insights.sbomify.com/CVE-2023-46886/): Path traversal in n/a (critical 9.1)
- [CVE-2023-50017](https://insights.sbomify.com/CVE-2023-50017/): Cross-site request forgery in n/a (high 8.8)
- [CVE-2023-48912](https://insights.sbomify.com/CVE-2023-48912/): Cross-site request forgery in n/a (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-2473 and fix it if it is affected.

What it is: CVE-2023-2473 is a medium-severity denial of service vulnerability in Dreamer CMS, published on 2 May 2023. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2023-2473 in the wild and no public exploit code.

Affected product: Dreamer CMS. 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/CVE-2023-2473/ (Markdown: https://insights.sbomify.com/CVE-2023-2473/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-2473
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-2473
- OSV: https://osv.dev/vulnerability/CVE-2023-2473

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-2473/
Summaries are generated and may contain mistakes; the official description above is the record.