CVE-2026-4248: Ultimate Member <= 2.11.2 - Authenticated (Contributor+) Sensitive Information Exposure to Account Takeover via Shortcode Template Tag
The Ultimate Member plugin for WordPress is vulnerable to Sensitive Information Exposure in all versions up to, and including, 2.11.2. This is due to the '{usermeta:passwordresetlink}' template tag being processed within post content via the '[umloggedin]' shortcode, which generates a valid password reset token for the currently logged-in user viewing the page. This makes it possible for authenticated attackers, with Contributor-level access and above, to craft a malicious pending post that, when previewed by an Administrator, generates a password reset token for the Administrator and exfiltrates it to an attacker-controlled server, leading to full account takeover.
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2026-4248?
CVE-2026-4248 is considered a high-severity vulnerability due to its potential for sensitive information exposure that could lead to account takeover.
How do I fix CVE-2026-4248?
To fix CVE-2026-4248, upgrade the Ultimate Member plugin for WordPress to version 2.11.3 or later.
What kind of information is exposed in CVE-2026-4248?
CVE-2026-4248 exposes sensitive user data through the shortcode template tag, which may allow unauthorized access to user accounts.
Who is affected by CVE-2026-4248?
Any WordPress site using the Ultimate Member plugin version 2.11.2 or earlier is affected by CVE-2026-4248.
Is CVE-2026-4248 being actively exploited?
There have been reports of CVE-2026-4248 being targeted in the wild, highlighting the urgency of applying the fix.