CVE-2026-4409Network attack vector

Unauthenticated subscription changes via forgeable management keys

Published May 5, 2026 · Updated May 5, 2026

Improper authorization in WPKube Subscribe to Comments Reloaded 240119 and earlier allows remote attackers to alter subscription settings. The public user-management template exposes a global secret, while the plugin derives management keys with a weak hash that attackers can reproduce. No authentication or user interaction is required; any reachable public post supplies the secret needed to manage subscriptions for arbitrary users.

CVSS severity6.5
Medium
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authorization in WPKube Subscribe to Comments Reloaded 240119 and earlier allows remote attackers to alter subscription settings. The public user-management template exposes a global secret, while the plugin derives management keys with a weak hash that attackers can reproduce. No authentication or user interaction is required; any reachable public post supplies the secret needed to manage subscriptions for arbitrary users.

The record

CVE
CVE-2026-4409
Published
May 5, 2026
Updated
May 5, 2026
Vendor
WP White Security
Product
Subscribe to Comments Reloaded
Classifications
CWE-200, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 5, 2026CVE publishedPublication date reported by the CVE source.
  2. May 5, 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 <=240119

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

WP White Security · Subscribe to Comments Reloadedversion=0 <=240119

Published CVSS scores

6.5WordfenceCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A: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 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

CWE-200Exposure of Sensitive Information to an Unauthorized Actor
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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