CVE-2023-5340Public exploitNetwork attack vector

Unauthenticated gadget-chain execution via cart AJAX deserialization

Published Nov 20, 2023 · Updated Nov 21, 2024

PHP object injection in Five Star Restaurant Menu and Food Ordering before 2.4.11 allows remote attackers to invoke available gadget chains. The unauthenticated fdm_update_cart_item AJAX handler passes its attacker-controlled options parameter to PHP unserialization. Exploitation requires a suitable gadget class already loaded on the WordPress site and can execute only behavior exposed by that chain.

CVSS severity9.8
Critical
EPSS probability1.24%
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 Five Star Restaurant Menu and Food Ordering before 2.4.11 allows remote attackers to invoke available gadget chains. The unauthenticated fdm_update_cart_item AJAX handler passes its attacker-controlled options parameter to PHP unserialization. Exploitation requires a suitable gadget class already loaded on the WordPress site and can execute only behavior exposed by that chain.

The record

CVE
CVE-2023-5340
Published
Nov 20, 2023
Updated
Nov 21, 2024
Vendor
Five Star Plugins
Product
Five Star Restaurant Menu and Food Ordering
Classifications
CWE-502, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 20, 2023CVE publishedPublication date reported by the CVE source.
  2. Nov 21, 2024Record 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 <2.4.11

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Five Star Plugins · Five Star Restaurant Menu and Food Orderingversion=0 <2.4.11

Published CVSS scores

9.8NIST NVDCVSS: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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

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

Public exploit references

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

Technologies

Your stack

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Your stack

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