CVE-2023-54403
Yonyou U8 CRM Arbitrary File Read via getemaildata.php
CVSS Score
7.5
EPSS Score
0.0%
EPSS Percentile
0th
Yonyou U8 CRM before V16.5 and V18 contains an arbitrary file read vulnerability in /ajax/getemaildata.php that allows unauthenticated attackers to bypass authentication using the DontCheckLogin=1 parameter and read arbitrary files via an unvalidated filePath parameter. Attackers can exploit this flaw to read sensitive files outside the web application directory, including configuration files containing database or service credentials. Exploitation evidence was first observed by the Shadowserver Foundation on 2023-10-14.
| CWE | CWE-22 |
| Vendor | yonyou |
| Product | u8 crm |
| Published | Sep 30, 2026 |
Stay Ahead of the Next One
Get instant alerts for yonyou u8 crm
Be the first to know when new high vulnerabilities affecting yonyou u8 crm are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None
Affected Versions
Yonyou / U8 CRM
16.1 16.0 15.1 13
References
security.yonyou.com: https://security.yonyou.com/#/noticeInfo?id=624 github.com: https://github.com/projectdiscovery/nuclei-templates/blob/main/http/vulnerabilities/yonyou/yonyou-u8-crm-lfi.yaml github.com: 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 yonyou.com: https://www.yonyou.com/Global/ vulncheck.com: https://www.vulncheck.com/advisories/yonyou-u8-crm-arbitrary-file-read-via-getemaildata-php
Credits
🔍 The Shadowserver Foundation