CVE-2023-54403

HIGHPre-NVD 7.57.5—
EchelonGraph scoreHIGH confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-09-30. A secondary CVSS source baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
7.5EG
EchelonGraph verdictPlan mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 7.5Exploit: None knownExposed services: Not assessed

No fix is confirmed yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for the fix.

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.

CVSS v3
7.5
EG Score
7.5HIGHhigh confidence
EG Risk
49
EG Risk 49/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity75% × 45%
Exploitation0% × 40%
Automatability100% × 15%
CISA SSVC: Track at low or medium mission impact; Attend at high (mission-essential systems).
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.
EPSS PROB
0.5%
EPSS %ILE
37th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Attend at high (mission-essential systems).

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

September 30, 2026

Last Modified

October 2, 2026

Advisory Details (5)

Auto-updated Sep 30, 2026
No patch confirmed yet.
generic

Yonyou U8 CRM Arbitrary File Read via getemaildata.php | Advisories | VulnCheck

https://www.vulncheck.com/advisories/yonyou-u8-crm-arbitrary-file-read-via-getemaildata-php
generic

Enterprise Digital-Intelligence Yonyou BIP - Yonyou Global Official Website

https://www.yonyou.com/Global/
generic

PeiQi-WIKI-Book/docs/wiki/oa/用友OA/用友 U8 CRM客户关系管理系统 getemaildata.php 任意文件读取漏洞.md at main · PeiQi0/PeiQi-WIKI-Book · GitHub

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
generic

nuclei-templates/http/vulnerabilities/yonyou/yonyou-u8-crm-lfi.yaml at main · projectdiscovery/nuclei-templates · GitHub

https://github.com/projectdiscovery/nuclei-templates/blob/main/http/vulnerabilities/yonyou/yonyou-u8-crm-lfi.yaml
generic

用友安全中心

https://security.yonyou.com/#/noticeInfo?id=624

Vendor Advisories for CVE-2023-54403(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 24× in last 7d / 24× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-10-05 04:48 UTCEG score recompute
  2. 2026-10-05 04:48 UTCGHSA enrichment
  3. 2026-10-04 23:20 UTCEPSS rescore
  4. 2026-10-04 16:56 UTCGHSA enrichment
  5. 2026-10-04 05:04 UTCGHSA enrichment
  6. 2026-10-03 17:13 UTCEG score recompute
  7. 2026-10-03 17:13 UTCGHSA enrichment
  8. 2026-10-03 14:23 UTCEPSS rescore
  9. 2026-10-03 05:21 UTCGHSA enrichment
  10. 2026-10-02 17:30 UTCEG score recompute
  11. 2026-10-02 17:29 UTCGHSA enrichment
  12. 2026-10-02 16:45 UTCEG score recompute
  13. 2026-10-02 16:45 UTCGHSA enrichment
  14. 2026-10-02 14:58 UTCGHSA enrichment
  15. 2026-10-02 03:07 UTCEG score recompute
  16. 2026-10-02 03:06 UTCGHSA enrichment
  17. 2026-10-01 19:48 UTCEPSS rescore
  18. 2026-10-01 19:48 UTCEPSS rescore
  19. 2026-10-01 15:13 UTCGHSA enrichment
  20. 2026-10-01 09:17 UTCEG score recompute
  21. 2026-10-01 09:17 UTCGHSA enrichment
  22. 2026-09-30 21:26 UTCEG score recompute
  23. 2026-09-30 20:36 UTCEG score recompute
  24. 2026-09-30 20:35 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2023-54403?
CVE-2023-54403 is a high vulnerability published on September 30, 2026. 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…
When was CVE-2023-54403 disclosed?
CVE-2023-54403 was first published on September 30, 2026, with the most recent update on October 2, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-54403 actively exploited?
CVE-2023-54403 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (37th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2023-54403?
CVE-2023-54403 has a CVSS base score of 7.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2023-54403?
No fix for CVE-2023-54403 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2023-54403 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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