contrid Newsletters Plugin up to 4.18.2 on WordPress Shortcode user_email sql injection

Summaryinfo

A vulnerability classified as critical was found in contrid Newsletters Plugin up to 4.18.2. Affected is an unknown function of the component Shortcode Handler. Such manipulation of the argument user_email leads to sql injection. This vulnerability is listed as CVE-2026-122063. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability was found in contrid Newsletters Plugin up to 4.18.2. It has been rated as critical. Affected by this issue is an unknown function of the component Shortcode Handler. The manipulation of the argument user_email with an unknown input leads to a sql injection vulnerability. Using CWE to declare the problem leads to CWE-89. The product constructs all or part of an SQL command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended SQL command when it is sent to a downstream component. Without sufficient removal or quoting of SQL syntax in user-controllable inputs, the generated SQL query can cause those inputs to be interpreted as SQL instead of ordinary user data. Impacted is confidentiality, integrity, and availability. CVE summarizes:

The Newsletters plugin for WordPress is vulnerable to blind SQL Injection via the 'user_email' parameter in all versions up to, and including, 4.18.2 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for authenticated attackers, with subscriber-level access and above, to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database. Exploitation requires the admin-controlled 'currentusersubscribed' option to be enabled and at least one page rendering the Newsletters subscribe shortcode or widget to exist; a Subscriber-level attacker can self-serve the attack by updating their own profile email to a crafted payload and loading such a page.

The advisory is shared for download at wordfence.com. This vulnerability is handled as CVE-2026-122063 since 11/04/2026. The exploitation is known to be easy. The attack may be launched 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 11/13/2026). The MITRE ATT&CK project declares the attack technique as T1505.

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

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Productinfo

Type

• WordPress Plugin

Vendor

• contrid

Name

• Newsletters Plugin

Version

• 4.18.0
• 4.18.1
• 4.18.2

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CPE 2.2info

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