CVE-2026-103331 (GCVE-0-2026-103331)
Vulnerability from cvelistv5
Published
2026-10-28 06:00
Modified
2026-10-28 17:58
Severity ?
VLAI Severity ?
EPSS score ?
Summary
The UniPAY Payment Gateway For WooCommerce WordPress plugin through 2.3 does not properly verify the authenticity of payment notifications, as their signature is checked against a merchant secret that is empty by default, allowing unauthenticated attackers to forge a valid notification and mark arbitrary orders as paid.
References
| URL | Tags | ||||
|---|---|---|---|---|---|
|
|||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Unknown | UniPAY Payment Gateway For WooCommerce |
Version: 0 ≤ 2.3 |
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"containers": {
"adp": [
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"metrics": [
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"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
"version": "3.1"
}
},
{
"other": {
"content": {
"id": "CVE-2026-103331",
"options": [
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},
{
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},
{
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],
"role": "CISA Coordinator",
"timestamp": "2026-10-28T17:51:06.716523Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"problemTypes": [
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"description": "CWE-287 Improper Authentication",
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"providerMetadata": {
"dateUpdated": "2026-10-28T17:58:09.780Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unknown",
"product": "UniPAY Payment Gateway For WooCommerce",
"vendor": "Unknown",
"versions": [
{
"lessThanOrEqual": "2.3",
"status": "affected",
"version": "0",
"versionType": "semver"
}
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],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "Naoki Kawahigashi"
},
{
"lang": "en",
"type": "coordinator",
"value": "WPScan"
}
],
"descriptions": [
{
"lang": "en",
"value": "The UniPAY Payment Gateway For WooCommerce WordPress plugin through 2.3 does not properly verify the authenticity of payment notifications, as their signature is checked against a merchant secret that is empty by default, allowing unauthenticated attackers to forge a valid notification and mark arbitrary orders as paid."
}
],
"problemTypes": [
{
"descriptions": [
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"description": "CWE-287 Improper Authentication",
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"providerMetadata": {
"dateUpdated": "2026-10-28T06:00:19.793Z",
"orgId": "1bfdd5d7-9bf6-4a53-96ea-42e2716d7a81",
"shortName": "WPScan"
},
"references": [
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"tags": [
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"vdb-entry",
"technical-description"
],
"url": "https://wpscan.com/vulnerability/a7d61b5f-9e92-459c-8f6d-1c92ea94ef00/"
}
],
"source": {
"discovery": "EXTERNAL"
},
"title": "UniPAY Payment Gateway For WooCommerce \u003c= 2.3 - Unauthenticated Order Payment Forgery via Empty IPN Secret",
"x_generator": {
"engine": "WPScan CVE Generator"
}
}
},
"cveMetadata": {
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"cveId": "CVE-2026-103331",
"datePublished": "2026-10-28T06:00:19.793Z",
"dateReserved": "2026-09-30T12:41:17.576Z",
"dateUpdated": "2026-10-28T17:58:09.780Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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