CVE-2026-15930Public exploitNetwork attack vector

Unauthenticated administrator takeover via unchecked user creation

Published Aug 3, 2026 · Updated Aug 3, 2026

Missing authorization in wp.insider Simple Membership before 4.7.8 allows remote attackers to take over the primary administrator account. The registration path passes a failed create_wp_user result onward as a user ID, so a crafted username collision updates user ID 1 with attacker-controlled profile data. Exploitation requires a single-site installation with public free registration and enables takeover after the administrator email is replaced and password reset is invoked.

CVSS severity9.4
Critical
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authorization in wp.insider Simple Membership before 4.7.8 allows remote attackers to take over the primary administrator account. The registration path passes a failed create_wp_user result onward as a user ID, so a crafted username collision updates user ID 1 with attacker-controlled profile data. Exploitation requires a single-site installation with public free registration and enables takeover after the administrator email is replaced and password reset is invoked.

The record

CVE
CVE-2026-15930
Published
Aug 3, 2026
Updated
Aug 3, 2026
Vendor
WP Affiliate Manager
Product
Simple Membership
Classifications
CWE-862, T1098
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 3, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 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=0 <4.7.8

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

WP Affiliate Manager · Simple Membershipversion=0 <4.7.8

Published CVSS scores

9.4CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/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-862Missing Authorization
T1098Account Manipulation

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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