CVE-2023-54403 Yonyou U8 CRM Arbitrary File Read via getemaildata.php
Unauthenticated attackers can bypass authentication and read arbitrary files, including credentials, via a path traversal vulnerability in Yonyou U8 CRM.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2023-54403?
CVE-2023-54403 is a high-severity path traversal vulnerability in Yonyou U8 CRM, published on 30 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-22
Which versions are affected by CVE-2023-54403?
How do I fix CVE-2023-54403?
No fix has been published for CVE-2023-54403 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2023-54403 being exploited?
There is no known exploitation of CVE-2023-54403 in the wild and no public exploit code.
Sources
Also known as GHSA-8vgx-v6gm-mhxr.