CVE-2026-78065Network attack vector

Authenticated guest address disclosure via empty-owner bypass

Published Sep 3, 2026 · Updated Sep 3, 2026

IDOR in J2Commerce J2Store 1.0.0 through 3.3.21 and 4.0.0 through 4.1.6 allows remote authenticated users to read guest addresses. The editAddress() method redirects non-owners only when an address has a nonempty user_id, leaving guest rows accessible through sequential address_id values. Any logged-in account can enumerate guest records and view full names, street addresses, and phone numbers in the prefilled edit form.

CVSS severity7.1
High
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

IDOR in J2Commerce J2Store 1.0.0 through 3.3.21 and 4.0.0 through 4.1.6 allows remote authenticated users to read guest addresses. The editAddress() method redirects non-owners only when an address has a nonempty user_id, leaving guest rows accessible through sequential address_id values. Any logged-in account can enumerate guest records and view full names, street addresses, and phone numbers in the prefilled edit form.

The record

CVE
CVE-2026-78065
Published
Sep 3, 2026
Updated
Sep 3, 2026
Vendor
J2Commerce
Product
J2Store
Classifications
CWE-639
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 3, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 3, 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=1.0.0-3.3.21
  2. Affected versionversion=4.0.0-4.0.21
  3. Affected versionversion=4.1.0-4.1.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

J2Commerce · J2Storeversion=1.0.0-3.3.21; version=4.0.0-4.0.21; version=4.1.0-4.1.6

Published CVSS scores

7.1Joomla CNACVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

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-639Authorization Bypass Through User-Controlled Key

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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