Vulnerability · Published Oct 3, 2026 · Assigned by Wordfence

CVE-2026-96270Ultimate Member <= 2.13.1 - Unauthenticated Stored Cross-Site Scripting via 'form_id' Parameter

High 7.2

In plain English

A high-severity cross-site scripting in Ultimate Member – User Profile, Registration, Login, Member Directory, Content Restriction & Membership Plugin from ultimatemember. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 16% of all known vulnerabilities).

Severity (CVSS 3.1)7.2High

Exploit odds (30 days)0.2%top 84.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

The Ultimate Member – User Profile, Registration, Login, Member Directory, Content Restriction & Membership Plugin plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'form_id' parameter in all versions up to, and including, 2.13.1 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The injected payload is stored in the registering user's 'submitted' usermeta via update_user_meta() and is only triggered when an administrator opens the affected user record in the wp-admin Users modal, which inserts the unescaped output via jQuery .html().

Affected products (as reported)

Vendor	Product	Versions
ultimatemember	Ultimate Member – User Profile, Registration, Login, Member Directory, Content Restriction & Membership Plugin	0 – through 2.13.1

Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

In plain English

Official description

Affected products (as reported)

References