brewlabs SendPress Newsletters Plugin up to 1.26.1.20 on WordPress Shortcode subscriberid sql injection

Summaryinfo

A vulnerability identified as critical has been detected in brewlabs SendPress Newsletters Plugin up to 1.26.1.20. This impacts an unknown function of the component Shortcode Handler. Performing a manipulation of the argument subscriberid results in sql injection. This vulnerability was named CVE-2026-93855. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability classified as critical has been found in brewlabs SendPress Newsletters Plugin up to 1.26.1.20. This affects some unknown functionality of the component Shortcode Handler. The manipulation of the argument subscriberid with an unknown input leads to a sql injection vulnerability. CWE is classifying the issue as 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. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

The SendPress Newsletters plugin for WordPress is vulnerable to time-based SQL Injection via the 'subscriberid' parameter in all versions up to, and including, 1.26.1.20 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for unauthenticated attackers to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database. The nonce gating the handler uses the hardcoded action value 'sendpress-is-awesome', which is rendered on the same public page served by the [sp-form formid="manage"] shortcode, making it trivially obtainable by unauthenticated visitors and effectively bypassing the nonce as an access control.

It is possible to read the advisory at wordfence.com. This vulnerability is uniquely identified as CVE-2026-93855 since 09/18/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 10/29/2026). The attack technique deployed by this issue is T1505 according to MITRE ATT&CK.

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

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-112587). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

• WordPress Plugin

Vendor

• brewlabs

Name

• SendPress Newsletters Plugin

Version

• 1.26.1.0
• 1.26.1.1
• 1.26.1.2
• 1.26.1.3
• 1.26.1.4
• 1.26.1.5
• 1.26.1.6
• 1.26.1.7
• 1.26.1.8
• 1.26.1.9
• 1.26.1.10
• 1.26.1.11
• 1.26.1.12
• 1.26.1.13
• 1.26.1.14
• 1.26.1.15
• 1.26.1.16
• 1.26.1.17
• 1.26.1.18
• 1.26.1.19
• 1.26.1.20

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CPE 2.2info

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Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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