CVE-2026-5459Network attack vector

Unauthenticated subscription overwrite via unchecked user ID

Published Jul 8, 2026 · Updated Jul 8, 2026

Authorization bypass in weDevs WP User Frontend 4.3.1 and earlier allows remote attackers to overwrite any user's subscription pack. The payment_page() function trusts a user-controlled user_id without confirming that the request may alter the referenced account. No authentication is required; assigning a free pack replaces an existing paid subscription and removes its paid features.

CVSS severity5.3
Medium
EPSS probability0.31%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authorization bypass in weDevs WP User Frontend 4.3.1 and earlier allows remote attackers to overwrite any user's subscription pack. The payment_page() function trusts a user-controlled user_id without confirming that the request may alter the referenced account. No authentication is required; assigning a free pack replaces an existing paid subscription and removes its paid features.

The record

CVE
CVE-2026-5459
Published
Jul 8, 2026
Updated
Jul 8, 2026
Vendor
HappyMonster
Product
WP User Frontend
Classifications
CWE-639
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 8, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 8, 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 <=4.3.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

HappyMonster · WP User Frontendversion=0 <=4.3.1

Published CVSS scores

5.3WordfenceCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/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.

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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 exploitUnconfirmed

Weakness, pattern, technique

CWE-639Authorization Bypass Through User-Controlled Key

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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