CVE-2020-29045Public exploitNetwork attack vector

Unauthenticated code execution via deserialized cart cookie

Published Mar 11, 2021 · Updated Aug 4, 2024

PHP object injection in Fivestar Plugins Five Star Restaurant Menu 2.2.0 and earlier allows remote attackers to execute code via a crafted cookie. The load_cart_from_cookie method in includes/class-cart-manager.php passes the untrusted fdm_cart cookie directly to PHP unserialize before checking the resulting value. No authentication or user interaction is required; execution depends on a usable gadget chain already loaded by the WordPress installation.

CVSS severity9.8
Critical
EPSS probability30.80%
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 Fivestar Plugins Five Star Restaurant Menu 2.2.0 and earlier allows remote attackers to execute code via a crafted cookie. The load_cart_from_cookie method in includes/class-cart-manager.php passes the untrusted fdm_cart cookie directly to PHP unserialize before checking the resulting value. No authentication or user interaction is required; execution depends on a usable gadget chain already loaded by the WordPress installation.

The record

CVE
CVE-2020-29045
Published
Mar 11, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-502, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 11, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5NIST NVDAV:N/AC:L/Au:N/C:P/I:P/A:P
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.

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

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 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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