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1 vulnerability found for Improve SEO by Unknown
CVE-2026-16618 (GCVE-0-2026-16618)
Vulnerability from cvelistv5 – Published: 2026-08-04 06:00 – Updated: 2026-08-04 17:40
VLAI
EPSS
VEX
Title
ImproveSEO <= 2.0.11 - Unauthenticated Arbitrary File Upload Leading to Remote Code Execution
Summary
The Improve SEO WordPress plugin through 2.0.11 does not properly validate uploaded files, checking only the file content type while writing the file with the attacker-supplied extension into a publicly accessible directory, allowing unauthenticated users to upload executable PHP files and achieve remote code execution.
Severity
9.8 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-434 Unrestricted Upload of File with Dangerous Type
- CWE-434 - Unrestricted Upload of File with Dangerous Type
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://wpscan.com/vulnerability/3754d4c0-1b67-49… | exploitvdb-entrytechnical-description |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Unknown | Improve SEO |
Affected:
0 , ≤ 2.0.11
(semver)
|
Credits
{
"containers": {
"adp": [
{
"metrics": [
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"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 9.8,
"baseSeverity": "CRITICAL",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
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"options": [
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"role": "CISA Coordinator",
"timestamp": "2026-08-04T17:39:47.820539Z",
"version": "2.0.3"
},
"type": "ssvc"
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}
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"problemTypes": [
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"descriptions": [
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"description": "CWE-434 Unrestricted Upload of File with Dangerous Type",
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"providerMetadata": {
"dateUpdated": "2026-08-04T17:40:09.473Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
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"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unknown",
"product": "Improve SEO",
"vendor": "Unknown",
"versions": [
{
"lessThanOrEqual": "2.0.11",
"status": "affected",
"version": "0",
"versionType": "semver"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "Jo\u00e3o Ramos Maciel"
},
{
"lang": "en",
"type": "coordinator",
"value": "WPScan"
}
],
"descriptions": [
{
"lang": "en",
"value": "The Improve SEO WordPress plugin through 2.0.11 does not properly validate uploaded files, checking only the file content type while writing the file with the attacker-supplied extension into a publicly accessible directory, allowing unauthenticated users to upload executable PHP files and achieve remote code execution."
}
],
"problemTypes": [
{
"descriptions": [
{
"description": "CWE-434 Unrestricted Upload of File with Dangerous Type",
"lang": "en",
"type": "CWE"
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}
],
"providerMetadata": {
"dateUpdated": "2026-08-04T06:00:08.334Z",
"orgId": "1bfdd5d7-9bf6-4a53-96ea-42e2716d7a81",
"shortName": "WPScan"
},
"references": [
{
"tags": [
"exploit",
"vdb-entry",
"technical-description"
],
"url": "https://wpscan.com/vulnerability/3754d4c0-1b67-49a4-a29a-7169446638d1/"
}
],
"source": {
"discovery": "EXTERNAL"
},
"title": "ImproveSEO \u003c= 2.0.11 - Unauthenticated Arbitrary File Upload Leading to Remote Code Execution",
"x_generator": {
"engine": "WPScan CVE Generator"
}
}
},
"cveMetadata": {
"assignerOrgId": "1bfdd5d7-9bf6-4a53-96ea-42e2716d7a81",
"assignerShortName": "WPScan",
"cveId": "CVE-2026-16618",
"datePublished": "2026-08-04T06:00:08.334Z",
"dateReserved": "2026-07-22T14:45:28.693Z",
"dateUpdated": "2026-08-04T17:40:09.473Z",
"state": "PUBLISHED"
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"dataType": "CVE_RECORD",
"dataVersion": "5.2"
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