CVE-2026-56053 EventPrime CVE debrief

Who should care

Defenders responsible for WordPress installations using the EventPrime plugin, especially those using versions up to 4.3.4.1, should assess their exposure and potential impacts.

Why it matters

CVE-2026-56053 is a PHP object injection vulnerability in EventPrime versions up to 4.3.4.1. Defenders should verify exposure, assess potential impacts, and prioritize remediation due to the potential for code execution and data tampering.

• Potential code execution through injected PHP objects
• Possible data tampering or unauthorized access
• Required verification of affected versions and exposure

Technical summary

The EventPrime plugin for WordPress, versions up to 4.3.4.1, is vulnerable to PHP object injection. This vulnerability arises from inadequate input validation and sanitization, allowing attackers to inject malicious PHP objects.

Defensive priority

Defenders should prioritize verifying exposure and assessing potential impacts, especially in environments using EventPrime versions up to 4.3.4.1.

Recommended defensive actions

• Verify exposure by checking EventPrime versions up to 4.3.4.1 in use
• Assess potential impacts on systems using EventPrime
• Consider upgrading to a version beyond 4.3.4.1 if available

Evidence notes

The CVE record and NVD entry provide limited information about the vulnerability. Further verification is needed to determine the full scope of affected versions and potential impacts.

Sources and references

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.