CVE-2026-3296Network attack vector

Unauthenticated PHP object injection via entry metadata

Published Apr 8, 2026 · Updated Apr 8, 2026

PHP object injection in WPEverest Everest Forms 3.4.3 and earlier allows remote attackers to submit serialized objects through public forms. The entries view passes stored wp_evf_entrymeta values to unserialize() without restricting allowed classes after sanitization preserves serialization control characters. Exploitation requires an administrator to view the poisoned entry, and further impact depends on an available PHP object gadget chain.

CVSS severity9.8
Critical
EPSS probability3.47%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

PHP object injection in WPEverest Everest Forms 3.4.3 and earlier allows remote attackers to submit serialized objects through public forms. The entries view passes stored wp_evf_entrymeta values to unserialize() without restricting allowed classes after sanitization preserves serialization control characters. Exploitation requires an administrator to view the poisoned entry, and further impact depends on an available PHP object gadget chain.

The record

CVE
CVE-2026-3296
Published
Apr 8, 2026
Updated
Apr 8, 2026
Vendor
WPEverest
Product
Everest Forms
Classifications
CWE-502, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 8, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 8, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=3.4.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

WPEverest · Everest Formsversion=0 <=3.4.3

Published CVSS scores

9.8WordfenceCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-502Deserialization of Untrusted Data
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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