CVE-2023-54403 (GCVE-0-2023-54403)

Vulnerability from cvelistv5 – Published: 2026-09-30 20:25 – Updated: 2026-10-02 16:34 X_Known Exploited Vulnerability
VLAI Previdian
Title
Yonyou U8 CRM Arbitrary File Read via getemaildata.php
Summary
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.
Severity
8.7 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-02 16:34 UTC
CWE
  • CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Assigner
References
Impacted products
Vendor Product Version
Yonyou U8 CRM Unaffected: 18 (custom)
Unaffected: 16.5 (custom)
Affected: 16.1 (custom)
Affected: 16.0 (custom)
Affected: 15.1 (custom)
Affected: 13 (custom)
Create a notification for this product.
Date Public
2023-08-12 00:00
Credits
The Shadowserver Foundation
Previdian
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: d37f3a46-397b-4c5a-9a37-0739db246356

Vulnerability ID: CVE-2023-54403

Status: Confirmed

Status Updated: 2026-09-30 22:40 CEST

Exploited: Yes

Timestamps
First Seen: 2026-09-30
Asserted: 2026-09-30
Scope
Notes: Yonyou U8 CRM Arbitrary File Read via getemaildata.php | Affected: Yonyou / U8 CRM | CVSS: 8.7 (HIGH) | EPSS: 0.00686 | Used in malware: unknown | Not yet in CISA KEV: True
Evidence

Type: Public Report

Signal: Successful Exploitation

Confidence: 70%

Source: previdian

Details
Feed Previdian (previdian.com)
Title Yonyou U8 CRM Arbitrary File Read via getemaildata.php
Cve Id CVE-2023-54403
Vendor Yonyou
Ghsa Id GHSA-8VGX-V6GM-MHXR
Product U8 CRM
Added Date 2026-09-30T20:40:20.538Z
Cvss Score 8.7
Epss Score 0.00686
Previous Ids
Cvss Severity HIGH
Virtual Patch False
Cvss Estimated False
Epss Percentile 0.50872
Used In Malware unknown
Vulnerability Id CVE-2023-54403
Ahead Of Cisa Kev None
Not Yet In Cisa Kev True
References
Created: 2026-10-02 09:09 CEST | Updated: 2026-10-02 09:09 CEST
Show details on NVD website
To clipboard 

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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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