# CVE-2023-40834: Auth bypass in n/a

> Attackers can brute force login credentials due to missing rate limiting, leading to unauthorized account access.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 12 Sep 2023
- **Updated:** 26 Sep 2024
- **Also known as:** GHSA-3j63-j2hv-xhg6

## What is CVE-2023-40834?

CVE-2023-40834 is a critical authentication bypass vulnerability in n/a, published on 12 Sep 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

OpenCart CMS v4.0.2.2 was discovered to lack a protective mechanism on its login page against excessive login attempts, allowing unauthenticated attackers to gain access to the application via a brute force attack to the password parameter.

Weakness: CWE-307 (Improper Restriction of Excessive Authentication Attempts)

## Which versions are affected by CVE-2023-40834?

It affects 1 product.


Products: Opencart Opencart.

## How do I fix CVE-2023-40834?

No fix has been published for CVE-2023-40834 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-40834 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-40834 exists.

## Other vulnerabilities in n/a

- [CVE-2014-3990](https://insights.sbomify.com/CVE-2014-3990/): Deserialization in n/a (critical 9.8)
- [CVE-2024-58341](https://insights.sbomify.com/CVE-2024-58341/): OpenCart Core 4.0.2.3 SQL Injection via search Parameter (high 8.8)
- [CVE-2023-47444](https://insights.sbomify.com/CVE-2023-47444/): Code injection in n/a (high 8.8)
- [CVE-2018-13067](https://insights.sbomify.com/CVE-2018-13067/): OpenCart Cross-Site Request Forgery (CSRF) (high 8.8)
- [CVE-2023-2315](https://insights.sbomify.com/CVE-2023-2315/): Path Traversal in OpenCart versions 4.0.0.0 to 4.0.2.2 (high 8.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-40834 and fix it if it is affected.

What it is: CVE-2023-40834 is a critical authentication bypass vulnerability in n/a, published on 12 Sep 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-40834 exists.

Affected product: n/a. 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-2023-40834/ (Markdown: https://insights.sbomify.com/CVE-2023-40834/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-40834
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-40834
- OSV: https://osv.dev/vulnerability/CVE-2023-40834

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-40834/
Summaries are generated and may contain mistakes; the official description above is the record.