# CVE-2024-4520: Improper Access Control in gaizhenbiao/chuanhuchatgpt

> Attackers can access other users' chat histories without authorization, exposing sensitive personal and financial data.

- **Severity:** High 7.5 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 4 Jun 2024
- **Updated:** 15 Oct 2025
- **Also known as:** GHSA-84rm-429m-4rw9

## What is CVE-2024-4520?

CVE-2024-4520 is a high-severity missing authorization vulnerability in gaizhenbiao/chuanhuchatgpt, published on 4 Jun 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

An improper access control vulnerability exists in the gaizhenbiao/chuanhuchatgpt application, specifically in version 20240410. This vulnerability allows any user on the server to access the chat history of any other user without requiring any form of interaction between the users. Exploitation of this vulnerability could lead to data breaches, including the exposure of sensitive personal details, financial data, or confidential conversations. Additionally, it could facilitate identity theft and manipulation or fraud through the unauthorized access to users' chat histories. This issue is due to insufficient access control mechanisms in the application's handling of chat history data.

Weakness: CWE-862 (Missing Authorization)

## Which versions are affected by CVE-2024-4520?

It affects 1 product.


Products: Gaizhenbiao Chuanhuchatgpt.

## How do I fix CVE-2024-4520?

No fix has been published for CVE-2024-4520 yet. Limit exposure of the affected software until one is available.

## Is CVE-2024-4520 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-4520 exists.

## Other vulnerabilities in gaizhenbiao/chuanhuchatgpt

- [CVE-2024-3234](https://insights.sbomify.com/CVE-2024-3234/): Path Traversal in gaizhenbiao/chuanhuchatgpt (critical 9.8)
- [CVE-2024-5982](https://insights.sbomify.com/CVE-2024-5982/): Path Traversal in gaizhenbiao/chuanhuchatgpt (critical 9.1)
- [CVE-2024-6255](https://insights.sbomify.com/CVE-2024-6255/): Path Traversal in gaizhenbiao/chuanhuchatgpt (high 8.2)
- [CVE-2024-8613](https://insights.sbomify.com/CVE-2024-8613/): Improper Access Control in gaizhenbiao/chuanhuchatgpt (high 8.1)
- [CVE-2024-9216](https://insights.sbomify.com/CVE-2024-9216/): Authentication Bypass in gaizhenbiao/ChuanhuChatGPT (high 8.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-4520 and fix it if it is affected.

What it is: CVE-2024-4520 is a high-severity missing authorization vulnerability in gaizhenbiao/chuanhuchatgpt, published on 4 Jun 2024. 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-2024-4520 exists.

Affected product: gaizhenbiao/chuanhuchatgpt. 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-2024-4520/ (Markdown: https://insights.sbomify.com/CVE-2024-4520/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-4520
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-4520
- OSV: https://osv.dev/vulnerability/CVE-2024-4520

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-4520/
Summaries are generated and may contain mistakes; the official description above is the record.