CVE-2026-96660Network attack vectorHinoki check available

Stored XSS via unescaped checkbox values

Published Oct 17, 2026 · Updated Oct 17, 2026

Stored XSS in User Registration & Membership 5.2.8 and earlier allows remote attackers to run scripts via checkbox values. Checkbox values receive insufficient input sanitization and output escaping, while the unauthenticated user_registration_user_form_submit AJAX action reaches ur_process_registration() without nonce validation. Injection requires no account, and stored scripts execute when a user opens an affected page, compromising browser-context data and page integrity rather than directly executing server commands.

CVSS severity7.2
High
EPSS probability0.23%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Stored XSS in User Registration & Membership 5.2.8 and earlier allows remote attackers to run scripts via checkbox values. Checkbox values receive insufficient input sanitization and output escaping, while the unauthenticated user_registration_user_form_submit AJAX action reaches ur_process_registration() without nonce validation. Injection requires no account, and stored scripts execute when a user opens an affected page, compromising browser-context data and page integrity rather than directly executing server commands.

The record

CVE
CVE-2026-96660
Published
Oct 17, 2026
Updated
Oct 17, 2026
Vendor
WPEverest
Product
User Registration & Membership
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 17, 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 <=5.2.8

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

WPEverest · User Registration & Membershipversion=0 <=5.2.8

Published CVSS scores

7.2WordfenceCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/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.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007JavaScript

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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