CVE-2026-75953Network attack vector

Arbitrary email relay via request recipient IDs

Published Aug 19, 2026 · Updated Aug 19, 2026

Open mail relay in CMSJunkie J-BusinessDirectory before 6.2.3 allows attackers to send email to arbitrary addresses via crafted requests. The offer and event contact flows use the contact_id_offer and contact_id_event values from the incoming request as the recipient address source instead of resolving the recipient from the server-side offer or event record. Exposure depends on those contact actions being reachable from the site front end; the flaw enables abuse of the application as a mail sender, with no published evidence of code execution or data modification.

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

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Summary

What happened

Open mail relay in CMSJunkie J-BusinessDirectory before 6.2.3 allows attackers to send email to arbitrary addresses via crafted requests. The offer and event contact flows use the contact_id_offer and contact_id_event values from the incoming request as the recipient address source instead of resolving the recipient from the server-side offer or event record. Exposure depends on those contact actions being reachable from the site front end; the flaw enables abuse of the application as a mail sender, with no published evidence of code execution or data modification.

The record

CVE
CVE-2026-75953
Published
Aug 19, 2026
Updated
Aug 19, 2026
Vendor
CMSJunkie - WordPress Business Directory Plugins
Product
J-BusinessDirectory
Classifications
CWE-201
Attack vector
network
Privileges
Unavailable

Timeline

How it unfolded

  1. Aug 19, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 19, 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=1.0.0-6.2.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesUnavailable in this record.

What is affected?

CMSJunkie - WordPress Business Directory Plugins · J-BusinessDirectoryversion=1.0.0-6.2.2

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.

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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
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-201Insertion of Sensitive Information Into Sent Data

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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