CVE-2026-42687 - Vulnerability Details - OpenCVE

Unauthenticated PHP Object Injection in EventPrime <= 4.3.2.1 versions.

No CVSS v4.0

Attack Vector Network

Attack Complexity High

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00317.

Exploitation none

Automatable no

Technical Impact total

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

Vendor Product Default status Versions

EventPrime

EventPrime

unaffected

Version	Status	Constraints
`n/a`	affected	≤ 4.3.2.1

No data.

No data.

No data.

Project Subscriptions

No data.

Advisories

No advisories yet.

Fixes

Solution

Update the WordPress EventPrime Plugin to the latest available version (at least 4.3.2.2).

Workaround

No workaround given by the vendor.

References

Link	Providers
https://patchstack.com/database/wordpress/plugin/eventprime-event-calendar-management/vulnerability/wordpress-eventprime-plugin-4-3-2-1-php-object-injection-vulnerability?_s_id=cve

History

Tue, 16 Jun 2026 06:30:00 +0000

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

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

Type	Values Removed	Values Added
Description		Unauthenticated PHP Object Injection in EventPrime <= 4.3.2.1 versions.
Title		WordPress EventPrime plugin <= 4.3.2.1 - PHP Object Injection vulnerability
Weaknesses		CWE-502
References		https://patchstack.com/database/wordpress/plugin/eventprime-event-calendar-management/vulnerability/wordpress-eventprime-plugin-4-3-2-1-php-object-injection-vulnerability?_s_id=cve
Metrics		cvssV3_1 `{'score': 8.1, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H'}`

Projects

Sign in to view the affected projects.

MITRE

Status: PUBLISHED

Assigner: Patchstack

Published: 2026-06-15T20:18:48.391Z

Updated: 2026-06-16T01:24:02.220Z

Reserved: 2026-04-29T09:04:56.882Z

Link: CVE-2026-42687

Vulnrichment

Updated: 2026-06-16T01:23:57.691Z

NVD

Status : Deferred

Published: 2026-06-15T21:16:56.870

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

Link: CVE-2026-42687

Redhat

No data.

OpenCVE Enrichment

No data.

Weaknesses

CWE-502

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-42687", "assignerOrgId": "21595511-bba5-4825-b968-b78d1f9984a3", "state": "PUBLISHED", "assignerShortName": "Patchstack", "dateReserved": "2026-04-29T09:04:56.882Z", "datePublished": "2026-06-15T20:18:48.391Z", "dateUpdated": "2026-06-16T01:24:02.220Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "21595511-bba5-4825-b968-b78d1f9984a3", "shortName": "Patchstack", "dateUpdated": "2026-06-15T20:18:48.391Z"}, "title": "WordPress EventPrime plugin <= 4.3.2.1 - PHP Object Injection vulnerability", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-502", "description": "CWE-502 Deserialization of Untrusted Data", "type": "CWE"}]}], "impacts": [{"capecId": "CAPEC-586", "descriptions": [{"lang": "en", "value": "CAPEC-586 Object Injection"}]}], "affected": [{"vendor": "EventPrime", "collectionURL": "https://wordpress.org/plugins", "defaultStatus": "unaffected", "packageName": "eventprime-event-calendar-management", "product": "EventPrime", "versions": [{"lessThanOrEqual": "4.3.2.1", "status": "affected", "version": "n/a", "versionType": "custom", "changes": [{"at": "4.3.2.2", "status": "unaffected"}]}]}], "descriptions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "Unauthenticated PHP Object Injection in EventPrime <= 4.3.2.1 versions."}], "value": "Unauthenticated PHP Object Injection in EventPrime <= 4.3.2.1 versions."}], "references": [{"tags": ["vdb-entry"], "url": "https://patchstack.com/database/wordpress/plugin/eventprime-event-calendar-management/vulnerability/wordpress-eventprime-plugin-4-3-2-1-php-object-injection-vulnerability?_s_id=cve"}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV3_1": {"attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH", "version": "3.1", "baseSeverity": "HIGH", "baseScore": 8.1, "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"}}], "solutions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "Update the WordPress EventPrime Plugin to the latest available version (at least 4.3.2.2)."}], "value": "Update the WordPress EventPrime Plugin to the latest available version (at least 4.3.2.2)."}], "credits": [{"lang": "en", "type": "finder", "user": "00000000-0000-4000-9000-000000000000", "value": "hhhai | Patchstack Bug Bounty Program"}], "source": {"discovery": "EXTERNAL"}, "x_generator": {"engine": "Vulnogram 0.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-06-16T01:09:53.687785Z", "id": "CVE-2026-42687", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-06-16T01:24:02.220Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-42687", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-06-16T01:09:53.687785Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-06-16T01:23:57.691Z"}}], "cna": {"title": "WordPress EventPrime plugin <= 4.3.2.1 - PHP Object Injection vulnerability", "source": {"discovery": "EXTERNAL"}, "credits": [{"lang": "en", "type": "finder", "user": "00000000-0000-4000-9000-000000000000", "value": "hhhai | Patchstack Bug Bounty Program"}], "impacts": [{"capecId": "CAPEC-586", "descriptions": [{"lang": "en", "value": "CAPEC-586 Object Injection"}]}], "metrics": [{"format": "CVSS", "cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 8.1, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "affected": [{"vendor": "EventPrime", "product": "EventPrime", "versions": [{"status": "affected", "changes": [{"at": "4.3.2.2", "status": "unaffected"}], "version": "n/a", "versionType": "custom", "lessThanOrEqual": "4.3.2.1"}], "packageName": "eventprime-event-calendar-management", "collectionURL": "https://wordpress.org/plugins", "defaultStatus": "unaffected"}], "solutions": [{"lang": "en", "value": "Update the WordPress EventPrime Plugin to the latest available version (at least 4.3.2.2).", "supportingMedia": [{"type": "text/html", "value": "Update the WordPress EventPrime Plugin to the latest available version (at least 4.3.2.2).", "base64": false}]}], "references": [{"url": "https://patchstack.com/database/wordpress/plugin/eventprime-event-calendar-management/vulnerability/wordpress-eventprime-plugin-4-3-2-1-php-object-injection-vulnerability?_s_id=cve", "tags": ["vdb-entry"]}], "x_generator": {"engine": "Vulnogram 0.2.0"}, "descriptions": [{"lang": "en", "value": "Unauthenticated PHP Object Injection in EventPrime <= 4.3.2.1 versions.", "supportingMedia": [{"type": "text/html", "value": "Unauthenticated PHP Object Injection in EventPrime <= 4.3.2.1 versions.", "base64": false}]}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-502", "description": "CWE-502 Deserialization of Untrusted Data"}]}], "providerMetadata": {"orgId": "21595511-bba5-4825-b968-b78d1f9984a3", "shortName": "Patchstack", "dateUpdated": "2026-06-15T20:18:48.391Z"}}}, "cveMetadata": {"cveId": "CVE-2026-42687", "state": "PUBLISHED", "dateUpdated": "2026-06-16T01:24:02.220Z", "dateReserved": "2026-04-29T09:04:56.882Z", "assignerOrgId": "21595511-bba5-4825-b968-b78d1f9984a3", "datePublished": "2026-06-15T20:18:48.391Z", "assignerShortName": "Patchstack"}, "dataVersion": "5.2"}