CVE-2026-4248: CWE-285 Improper Authorization in ultimatemember Ultimate Member – User Profile, Registration, Login, Member Directory, Content Restriction & Membership Plugin
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:password_reset_link}' template tag being processed within post content via the '[um_loggedin]' 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.
AI Analysis
Technical Summary
CVE-2026-4248 is an improper authorization vulnerability (CWE-285) in the Ultimate Member WordPress plugin (versions up to 2.11.2). The vulnerability arises from the processing of the '{usermeta:password_reset_link}' template tag inside post content rendered by the '[um_loggedin]' shortcode. Authenticated users with Contributor-level privileges or higher can create malicious pending posts that, when previewed by an Administrator, generate a valid password reset token for that Administrator and exfiltrate it to an attacker-controlled server. This flaw enables an attacker to take over Administrator accounts by leveraging the password reset mechanism.
Potential Impact
Successful exploitation allows an authenticated low-privilege user to escalate privileges by obtaining password reset tokens for Administrator accounts. This leads to full Administrator account takeover, compromising site integrity, confidentiality, and availability. The CVSS score of 8.0 reflects high impact on confidentiality, integrity, and availability.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict Contributor-level and higher users from creating or previewing posts containing the '[um_loggedin]' shortcode or the '{usermeta:password_reset_link}' template tag. Monitor for suspicious pending posts and limit administrative previews. Follow vendor updates closely for an official patch or temporary workaround.
CVE-2026-4248: CWE-285 Improper Authorization in ultimatemember Ultimate Member – User Profile, Registration, Login, Member Directory, Content Restriction & Membership Plugin
Description
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:password_reset_link}' template tag being processed within post content via the '[um_loggedin]' 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.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-4248 is an improper authorization vulnerability (CWE-285) in the Ultimate Member WordPress plugin (versions up to 2.11.2). The vulnerability arises from the processing of the '{usermeta:password_reset_link}' template tag inside post content rendered by the '[um_loggedin]' shortcode. Authenticated users with Contributor-level privileges or higher can create malicious pending posts that, when previewed by an Administrator, generate a valid password reset token for that Administrator and exfiltrate it to an attacker-controlled server. This flaw enables an attacker to take over Administrator accounts by leveraging the password reset mechanism.
Potential Impact
Successful exploitation allows an authenticated low-privilege user to escalate privileges by obtaining password reset tokens for Administrator accounts. This leads to full Administrator account takeover, compromising site integrity, confidentiality, and availability. The CVSS score of 8.0 reflects high impact on confidentiality, integrity, and availability.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict Contributor-level and higher users from creating or previewing posts containing the '[um_loggedin]' shortcode or the '{usermeta:password_reset_link}' template tag. Monitor for suspicious pending posts and limit administrative previews. Follow vendor updates closely for an official patch or temporary workaround.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Wordfence
- Date Reserved
- 2026-03-16T05:30:05.899Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 69c706502b68dbd88e324709
Added to database: 3/27/2026, 10:36:00 PM
Last enriched: 4/11/2026, 12:52:50 PM
Last updated: 5/11/2026, 11:00:09 PM
Views: 153
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