CVE-2024-4733Network attack vector

Authenticated PHP object injection via cookie deserialization

Published May 16, 2024 · Updated Apr 8, 2026

PHP object injection in Plainware ShiftController Employee Shift Scheduling 4.9.57 and earlier allows remote authenticated users to inject objects. The hc3_session cookie processing path deserializes attacker-controlled cookie data into PHP objects. Contributor-level access is required, and file deletion, sensitive-data retrieval, or code execution additionally requires a usable POP chain from another installed plugin or theme.

CVSS severity7.5
High
EPSS probability0.59%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

PHP object injection in Plainware ShiftController Employee Shift Scheduling 4.9.57 and earlier allows remote authenticated users to inject objects. The hc3_session cookie processing path deserializes attacker-controlled cookie data into PHP objects. Contributor-level access is required, and file deletion, sensitive-data retrieval, or code execution additionally requires a usable POP chain from another installed plugin or theme.

The record

CVE
CVE-2024-4733
Published
May 16, 2024
Updated
Apr 8, 2026
Vendor
Plainware
Product
ShiftController Employee Shift Scheduling
Classifications
CWE-502, T1068
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 16, 2024CVE 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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=0 <=4.9.57
  2. Affected versionversion=4.9.57

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Plainware · ShiftController Employee Shift Schedulingversion=0 <=4.9.57; version=4.9.57

Published CVSS scores

7.5WordfenceCVSS:3.1/AV:N/AC:H/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
T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo