CVE-2026-93855

SendPress Newsletters <= 1.26.1.20 - Unauthenticated SQL Injection via 'subscriberid' Parameter

2026-10-28 14:44
vulnmode

Strategic Overview

Status
Unpatched
Affected Plugin
SendPress Newsletters
Affected Version
<= 1.26.1.20
CVSS
7.5High
Weakness type
CWE-89 · Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
CVE
CVE-2026-93855
View all SendPress Newsletters vulnerabilities

At a glance

CVE-2026-93855 is a high-severity Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') vulnerability in the SendPress Newsletters WordPress plugin, affecting versions <= 1.26.1.20. It carries a CVSS score of 7.5 (reachable over the network; low attack complexity; high confidentiality impact). Exploitation requires no authentication. No fixed release has been reported yet; treat installations running this software as exposed. Disclosed October 2026, reported by vulnmode.

Vulnerability Overview

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.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no privileges on the target site, and no interaction from a victim user. A successful exploit has high impact on confidentiality.

CWE-89: Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')

SendPress Newsletters <= 1.26.1.20 carries this weakness at subscriberid, and reaching it takes no account at all. SQL injection happens when request data is concatenated into a query instead of being bound as a parameter, letting an attacker change the structure of the statement rather than just its values.

A working injection can read any table the database user can see, which on a WordPress install means user records, password hashes and session or API secrets stored in options. No fixed build of this plugin is recorded for SendPress Newsletters yet, so installs running <= 1.26.1.20 stay exposed until the vendor ships one.

Remediation

No known patch available. Please review the vulnerability's details in depth and employ mitigations based on your organization's risk tolerance. It may be best to uninstall the affected software and find a replacement.

How does WordSec protect against this?

Requests carrying this pattern arrive without a session, so nothing upstream of the firewall gets a chance to reject them: WordSec's web application firewall inspects request payloads before WordPress loads them. No patched version is recorded yet, which is the case where a filtering layer matters most, because there is nothing to update to.

  • Firewall
  • Login Security
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2026-93855https://www.wordfence.com/threat-intel/vulnerabilities/id/6b562f31-6a57-4719-a0e1-6a92affef844https://nvd.nist.gov/vuln/detail/CVE-2026-93855

Related records

Vulnerability data © Defiant, Inc., provided under the Wordfence Intelligence T&C