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PatchSiren cyber security CVE debrief

CVE-2026-42687 EventPrime CVE debrief

CVE-2026-42687 is a HIGH severity vulnerability (CVSS Score: 8.1) in the EventPrime plugin versions <= 4.3.2.1. The vulnerability allows unauthenticated PHP object injection. The CVE was published on [cvePublishedAt]2026-06-15T21:16:56.870Z[/cvePublishedAt] and modified on [cveModifiedAt]2026-06-15T21:24:32.790Z[/cveModifiedAt].

Vendor
EventPrime
Product
Unknown
CVSS
HIGH 8.1
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-15
Original CVE updated
2026-06-15
Advisory published
2026-06-15
Advisory updated
2026-06-15

Who should care

Users of EventPrime plugin versions <= 4.3.2.1 should apply patches or mitigations to prevent exploitation.

Technical summary

The vulnerability is caused by an unauthenticated PHP object injection in the EventPrime plugin. The CVSS vector is CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H, indicating a High severity vulnerability.

Defensive priority

HIGH

Recommended defensive actions

  • Apply patches or updates to EventPrime plugin versions <= 4.3.2.1.
  • Refer to [ref-4] for mitigation or vendor reference: Patchstack - WordPress EventPrime plugin 4.3.2.1 PHP Object Injection Vulnerability

Evidence notes

The CVE was reported by Patchstack ([email protected]) and listed in the NVD.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-42687 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-42687

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-42687 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-42687

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.