---
title: "CVE-2023-54403: Yonyou U8 CRM - Arbitrary File Read"
description: "Yonyou U8 CRM < V16.5 and < V18 contains an arbitrary file read vulnerability caused by unvalidated filePath parameter in /ajax/getemaildata.php, letting unauthenticated attackers read sensitive files, exploit requires use of DontCheckLogin=1 parameter."
url: https://panop.io/threat-heartbeat/CVE-2023-54403/
---

# CVE-2023-54403 Yonyou U8 CRM - Arbitrary File Read

Yonyou U8 CRM < V16.5 and < V18 contains an arbitrary file read vulnerability caused by unvalidated filePath parameter in /ajax/getemaildata.php, letting unauthenticated attackers read sensitive files, exploit requires use of DontCheckLogin=1 parameter.

CVSS base score 7.5 /10

High

CISA KEV

Exploited in the wild

Public exploit

None known

Authentication

Not required

EPSS

0.46% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2023-54403)

## Details

Type

Arbitrary File Read

Impact

File System Read, Information Disclosure

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Published

30 September 2026

Updated

15 October 2026

Weakness

[CWE-22](https://cwe.mitre.org/data/definitions/22.html)

## Vendor fix

Update to version V16.5 or later and V18 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2023-54403](https://nvd.nist.gov/vuln/detail/CVE-2023-54403)
- [https://www.cve.org/CVERecord?id=CVE-2023-54403](https://www.cve.org/CVERecord?id=CVE-2023-54403)
- [https://github.com/PeiQi0/PeiQi-WIKI-Book/blob/main/docs/wiki/oa/%E7%94%A8%E5%8F%8BOA/%E7%94%A8%E5%8F%8B%20U8%20CRM%E5%AE%A2%E6%88%B7%E5%85%B3%E7%B3%BB%E7%AE%A1%E7%90%86%E7%B3%BB%E7%BB%9F%20getemaildata.php%20%E4%BB%BB%E6%84%8F%E6%96%87%E4%BB%B6%E8%AF%BB%E5%8F%96%E6%BC%8F%E6%B4%9E.md](https://github.com/PeiQi0/PeiQi-WIKI-Book/blob/main/docs/wiki/oa/%E7%94%A8%E5%8F%8BOA/%E7%94%A8%E5%8F%8B%20U8%20CRM%E5%AE%A2%E6%88%B7%E5%85%B3%E7%B3%BB%E7%AE%A1%E7%90%86%E7%B3%BB%E7%BB%9F%20getemaildata.php%20%E4%BB%BB%E6%84%8F%E6%96%87%E4%BB%B6%E8%AF%BB%E5%8F%96%E6%BC%8F%E6%B4%9E.md)
- [https://github.com/projectdiscovery/nuclei-templates/blob/main/http/vulnerabilities/yonyou/yonyou-u8-crm-lfi.yaml](https://github.com/projectdiscovery/nuclei-templates/blob/main/http/vulnerabilities/yonyou/yonyou-u8-crm-lfi.yaml)
- [https://security.yonyou.com/#/noticeInfo?id=624](https://security.yonyou.com/#/noticeInfo?id=624)
- [https://www.vulncheck.com/advisories/yonyou-u8-crm-arbitrary-file-read-via-getemaildata-php](https://www.vulncheck.com/advisories/yonyou-u8-crm-arbitrary-file-read-via-getemaildata-php)
- [https://www.yonyou.com/Global/](https://www.yonyou.com/Global/)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

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