ultimatemember Ultimate Member Plugin up to 2.11.4 on WordPress AJAX get_directory_by_hash authorization

Summaryinfo

A vulnerability was found in ultimatemember Ultimate Member Plugin up to 2.11.4 on WordPress. It has been declared as critical. The impacted element is the function get_directory_by_hash of the component AJAX Handler. Executing a manipulation can lead to authorization. The identification of this vulnerability is CVE-2026-7761. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability classified as critical was found in ultimatemember Ultimate Member Plugin up to 2.11.4 on WordPress. This vulnerability affects the function get_directory_by_hash of the component AJAX Handler. The manipulation with an unknown input leads to a authorization vulnerability. The CWE definition for the vulnerability is CWE-862. The product does not perform an authorization check when an actor attempts to access a resource or perform an action. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

The Ultimate Member plugin for WordPress is vulnerable to Account Takeover via Password Reset Link Disclosure in all versions up to and including 2.11.4. This is due to a chain of three logic bugs: (1) an MD5 hash fallback in get_directory_by_hash() that allows any post to be used as a member directory by computing SUBSTRING(MD5(post_id), 11, 5), (2) a strstr() parsing logic flaw in post_data() that allows bypassing WordPress's protected meta key restrictions by placing '_um_' anywhere in the meta key name rather than at the start, and (3) missing field name validation in build_user_card_data() that allows arbitrary field names including 'password_reset_link' to be passed to um_filtered_value(). This makes it possible for authenticated attackers with Contributor-level access and above to create a malicious post via XMLRPC with crafted meta fields, use the MD5 fallback to point the member directory AJAX handler to their post, inject 'password_reset_link' into the tagline_fields configuration, and leak live password reset URLs for all users in the member directory response, including administrators.

The weakness was shared by Kevin Wydler. The advisory is shared for download at wordfence.com. This vulnerability was named CVE-2026-7761 since 05/04/2026. The exploitation appears to be easy. The attack can be initiated remotely. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 06/24/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• WordPress Plugin

Vendor

• ultimatemember

Name

• Ultimate Member Plugin

Version

• 2.11.0
• 2.11.1
• 2.11.2
• 2.11.3
• 2.11.4

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

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Once again VulDB remains the best source for vulnerability data.

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