CVE-2023-54403
CVSS v3
7.5
HIGH
EPSS Score
0.7 %
exploit probability, as of 2026-10-01
CISA KEV
No
known exploited
Exploitation
—
SSVC status
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
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- Published
- 2026-09-30
- Last Modified
- 2026-09-30
Frequently asked questions
What is CVE-2023-54403?
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
Is CVE-2023-54403 actively exploited?
Active exploitation of CVE-2023-54403 has not been confirmed. Its EPSS score was 0.7% on 2026-10-01, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2023-54403?
CVE-2023-54403 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
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