CVE-2023-3343Network attack vector

Authenticated PHP object injection via profile-picture deserialization

Published Jul 13, 2023 · Updated Apr 8, 2026

PHP object injection in WPEverest User Registration & Membership 3.0.1 and earlier allows remote authenticated users to inject PHP objects. Profile-picture handling passes the attacker-controlled profile-pic-url value to PHP deserialization without restricting instantiated classes. Subscriber-level access is required; the plugin has no POP chain, so file deletion, data disclosure, or code execution requires a gadget chain from another installed plugin or theme.

CVSS severity8.8
High
EPSS probability1.13%
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 User Registration & Membership 3.0.1 and earlier allows remote authenticated users to inject PHP objects. Profile-picture handling passes the attacker-controlled profile-pic-url value to PHP deserialization without restricting instantiated classes. Subscriber-level access is required; the plugin has no POP chain, so file deletion, data disclosure, or code execution requires a gadget chain from another installed plugin or theme.

The record

CVE
CVE-2023-3343
Published
Jul 13, 2023
Updated
Apr 8, 2026
Vendor
WPEverest
Product
User Registration & Membership
Classifications
CWE-502, CAPEC-586, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 13, 2023CVE 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 <=3.0.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

WPEverest · User Registration & Membershipversion=0 <=3.0.1

Published CVSS scores

8.8WordfenceCVSS:3.1/AV:N/AC:L/PR:L/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-502Deserialization of Untrusted Data
CAPEC-586Object Injection
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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