CVE-2023-54403 (GCVE-0-2023-54403)
Vulnerability from cvelistv5 – Published: 2026-09-30 20:25 – Updated: 2026-09-30 20:25 X_Known Exploited Vulnerability
VLAI
EPSS
VEX
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
CWE
- CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://security.yonyou.com/#/noticeInfo?id=624 | vendor-advisorypatch |
| https://github.com/projectdiscovery/nuclei-templa… | technical-description |
| https://github.com/PeiQi0/PeiQi-WIKI-Book/blob/ma… | exploit |
| https://www.yonyou.com/Global/ | product |
| https://www.vulncheck.com/advisories/yonyou-u8-cr… | third-party-advisory |
Impacted products
Date Public
2023-08-12 00:00
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "U8 CRM",
"vendor": "Yonyou",
"versions": [
{
"status": "unaffected",
"version": "18",
"versionType": "custom"
},
{
"status": "unaffected",
"version": "16.5",
"versionType": "custom"
},
{
"status": "affected",
"version": "16.1",
"versionType": "custom"
},
{
"status": "affected",
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"versionType": "custom"
},
{
"status": "affected",
"version": "15.1",
"versionType": "custom"
},
{
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"version": "13",
"versionType": "custom"
}
]
}
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"credits": [
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"type": "reporter",
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"descriptions": [
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}
],
"metrics": [
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"Recovery": "NOT_DEFINED",
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"baseScore": 8.7,
"baseSeverity": "HIGH",
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"privilegesRequired": "NONE",
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"descriptions": [
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"description": "Improper Limitation of a Pathname to a Restricted Directory (\u0027Path Traversal\u0027)",
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},
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},
{
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"tags": [
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],
"url": "https://www.yonyou.com/Global/"
},
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],
"url": "https://www.vulncheck.com/advisories/yonyou-u8-crm-arbitrary-file-read-via-getemaildata-php"
}
],
"source": {
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},
"tags": [
"x_known-exploited-vulnerability"
],
"title": "Yonyou U8 CRM Arbitrary File Read via getemaildata.php",
"x_generator": {
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}
},
"cveMetadata": {
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"cveId": "CVE-2023-54403",
"datePublished": "2026-09-30T20:25:40.223Z",
"dateReserved": "2026-09-30T20:24:49.776Z",
"dateUpdated": "2026-09-30T20:25:40.223Z",
"state": "PUBLISHED"
},
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"vulnerability-lookup:meta": {
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{
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{
"defaultStatus": "unaffected",
"product": "U8 CRM",
"vendor": "Yonyou",
"versions": [
{
"status": "unaffected",
"version": "18",
"versionType": "custom"
},
{
"status": "unaffected",
"version": "16.5",
"versionType": "custom"
},
{
"status": "affected",
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"versionType": "custom"
},
{
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},
{
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"versionType": "custom"
},
{
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"versionType": "custom"
}
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"cveTags": [],
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{
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"value": "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."
}
],
"id": "CVE-2023-54403",
"lastModified": "2026-09-30T21:16:52.150",
"metrics": {
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"attackVector": "NETWORK",
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"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
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"userInteraction": "NONE",
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"modifiedAttackComplexity": "NOT_DEFINED",
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"modifiedAttackVector": "NOT_DEFINED",
"modifiedPrivilegesRequired": "NOT_DEFINED",
"modifiedSubAvailabilityImpact": "NOT_DEFINED",
"modifiedSubConfidentialityImpact": "NOT_DEFINED",
"modifiedSubIntegrityImpact": "NOT_DEFINED",
"modifiedUserInteraction": "NOT_DEFINED",
"modifiedVulnAvailabilityImpact": "NOT_DEFINED",
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"modifiedVulnIntegrityImpact": "NOT_DEFINED",
"privilegesRequired": "NONE",
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"valueDensity": "NOT_DEFINED",
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}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- 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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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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