CVE-2026-39527 - Vulnerability Details - OpenCVE

Subscriber Arbitrary File Upload in WpStream < 4.11.2 versions.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact Low

Availability Impact Low

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation none

Automatable no

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

sc Internet Vivoo

WpStream

unaffected

Version	Status	Constraints
`n/a`	affected	< 4.11.2

No data.

No data.

No data.

Project Subscriptions

No data.

Advisories

No advisories yet.

Fixes

Solution

Update the WordPress WpStream Plugin to the latest available version (at least 4.11.2).

Workaround

No workaround given by the vendor.

References

Link	Providers
https://patchstack.com/database/wordpress/plugin/wpstream/vulnerability/wordpress-wpstream-plugin-4-11-2-arbitrary-file-upload-vulnerability?_s_id=cve

History

Mon, 15 Jun 2026 23:30:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Mon, 15 Jun 2026 20:30:00 +0000

Type	Values Removed	Values Added
Description		Subscriber Arbitrary File Upload in WpStream < 4.11.2 versions.
Title		WordPress WpStream plugin < 4.11.2 - Arbitrary File Upload vulnerability
Weaknesses		CWE-434
References		https://patchstack.com/database/wordpress/plugin/wpstream/vulnerability/wordpress-wpstream-plugin-4-11-2-arbitrary-file-upload-vulnerability?_s_id=cve
Metrics		cvssV3_1 `{'score': 5.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L'}`

Projects

Sign in to view the affected projects.

MITRE

Status: PUBLISHED

Assigner: Patchstack

Published: 2026-06-15T20:18:03.459Z

Updated: 2026-06-15T22:20:56.739Z

Reserved: 2026-04-07T10:48:09.605Z

Link: CVE-2026-39527

Vulnrichment

Updated: 2026-06-15T22:20:52.318Z

NVD

Status : Deferred

Published: 2026-06-15T21:16:46.827

Modified: 2026-06-15T21:24:32.790

Link: CVE-2026-39527

Redhat

No data.

OpenCVE Enrichment

No data.

Weaknesses

CWE-434

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-39527", "assignerOrgId": "21595511-bba5-4825-b968-b78d1f9984a3", "state": "PUBLISHED", "assignerShortName": "Patchstack", "dateReserved": "2026-04-07T10:48:09.605Z", "datePublished": "2026-06-15T20:18:03.459Z", "dateUpdated": "2026-06-15T22:20:56.739Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "21595511-bba5-4825-b968-b78d1f9984a3", "shortName": "Patchstack", "dateUpdated": "2026-06-15T20:18:03.459Z"}, "title": "WordPress WpStream plugin < 4.11.2 - Arbitrary File Upload vulnerability", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-434", "description": "CWE-434 Unrestricted Upload of File with Dangerous Type", "type": "CWE"}]}], "impacts": [{"capecId": "CAPEC-17", "descriptions": [{"lang": "en", "value": "CAPEC-17 Using Malicious Files"}]}], "affected": [{"vendor": "sc Internet Vivoo", "collectionURL": "https://wordpress.org/plugins", "defaultStatus": "unaffected", "packageName": "wpstream", "product": "WpStream", "versions": [{"lessThan": "4.11.2", "status": "affected", "version": "n/a", "versionType": "custom", "changes": [{"at": "4.11.2", "status": "unaffected"}]}]}], "descriptions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "Subscriber Arbitrary File Upload in WpStream < 4.11.2 versions."}], "value": "Subscriber Arbitrary File Upload in WpStream < 4.11.2 versions."}], "references": [{"tags": ["vdb-entry"], "url": "https://patchstack.com/database/wordpress/plugin/wpstream/vulnerability/wordpress-wpstream-plugin-4-11-2-arbitrary-file-upload-vulnerability?_s_id=cve"}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV3_1": {"attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "availabilityImpact": "LOW", "version": "3.1", "baseSeverity": "MEDIUM", "baseScore": 5.4, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L"}}], "solutions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "Update the WordPress WpStream Plugin to the latest available version (at least 4.11.2)."}], "value": "Update the WordPress WpStream Plugin to the latest available version (at least 4.11.2)."}], "credits": [{"lang": "en", "type": "finder", "user": "00000000-0000-4000-9000-000000000000", "value": "Muhammad Sharief | Patchstack Bug Bounty Program"}], "source": {"discovery": "EXTERNAL"}, "x_generator": {"engine": "Vulnogram 0.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-06-15T22:20:46.851882Z", "id": "CVE-2026-39527", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-06-15T22:20:56.739Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-39527", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-06-15T22:20:46.851882Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-06-15T22:20:52.318Z"}}], "cna": {"title": "WordPress WpStream plugin < 4.11.2 - Arbitrary File Upload vulnerability", "source": {"discovery": "EXTERNAL"}, "credits": [{"lang": "en", "type": "finder", "user": "00000000-0000-4000-9000-000000000000", "value": "Muhammad Sharief | Patchstack Bug Bounty Program"}], "impacts": [{"capecId": "CAPEC-17", "descriptions": [{"lang": "en", "value": "CAPEC-17 Using Malicious Files"}]}], "metrics": [{"format": "CVSS", "cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.4, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "LOW", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "affected": [{"vendor": "sc Internet Vivoo", "product": "WpStream", "versions": [{"status": "affected", "changes": [{"at": "4.11.2", "status": "unaffected"}], "version": "n/a", "lessThan": "4.11.2", "versionType": "custom"}], "packageName": "wpstream", "collectionURL": "https://wordpress.org/plugins", "defaultStatus": "unaffected"}], "solutions": [{"lang": "en", "value": "Update the WordPress WpStream Plugin to the latest available version (at least 4.11.2).", "supportingMedia": [{"type": "text/html", "value": "Update the WordPress WpStream Plugin to the latest available version (at least 4.11.2).", "base64": false}]}], "references": [{"url": "https://patchstack.com/database/wordpress/plugin/wpstream/vulnerability/wordpress-wpstream-plugin-4-11-2-arbitrary-file-upload-vulnerability?_s_id=cve", "tags": ["vdb-entry"]}], "x_generator": {"engine": "Vulnogram 0.2.0"}, "descriptions": [{"lang": "en", "value": "Subscriber Arbitrary File Upload in WpStream < 4.11.2 versions.", "supportingMedia": [{"type": "text/html", "value": "Subscriber Arbitrary File Upload in WpStream < 4.11.2 versions.", "base64": false}]}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-434", "description": "CWE-434 Unrestricted Upload of File with Dangerous Type"}]}], "providerMetadata": {"orgId": "21595511-bba5-4825-b968-b78d1f9984a3", "shortName": "Patchstack", "dateUpdated": "2026-06-15T20:18:03.459Z"}}}, "cveMetadata": {"cveId": "CVE-2026-39527", "state": "PUBLISHED", "dateUpdated": "2026-06-15T22:20:56.739Z", "dateReserved": "2026-04-07T10:48:09.605Z", "assignerOrgId": "21595511-bba5-4825-b968-b78d1f9984a3", "datePublished": "2026-06-15T20:18:03.459Z", "assignerShortName": "Patchstack"}, "dataVersion": "5.2"}