CVE-2026-84099Network attack vector

Unauthenticated PHP object injection via PayPal add-on

Published Sep 12, 2026 · Updated Sep 12, 2026

PHP object injection in Jquindlen wpStoreCart 5.0.7 and earlier allows remote attackers to inject PHP objects via a PayPal add-on. The bundled wpsc-membership-pro paypal.php endpoint accepts direct unauthenticated requests and deserializes user-supplied input without restricting permitted classes. The injection alone does not establish code execution; further impact requires a suitable PHP gadget chain from software present on the WordPress site.

CVSS severityUnavailable
Unscored
EPSS probability0.27%
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 Jquindlen wpStoreCart 5.0.7 and earlier allows remote attackers to inject PHP objects via a PayPal add-on. The bundled wpsc-membership-pro paypal.php endpoint accepts direct unauthenticated requests and deserializes user-supplied input without restricting permitted classes. The injection alone does not establish code execution; further impact requires a suitable PHP gadget chain from software present on the WordPress site.

The record

CVE
CVE-2026-84099
Published
Sep 12, 2026
Updated
Sep 12, 2026
Vendor
Jquindlen
Product
wpStoreCart
Classifications
T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 12, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 12, 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 <=5.0.7

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Jquindlen · wpStoreCartversion=0 <=5.0.7

Published CVSS scores

No CVSS assessment is available in this record.

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 exploitUnconfirmed

Weakness, pattern, technique

T1190Exploit Public-Facing Application

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

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Your stack

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