What’s Vulnerable › Vulnerabilities

CVE-2026-1651: Email Subscribers & Newsletters <= 5.9.16 - Authenticated (Administrator+) SQL Injection via 'workflow_ids' Parameter

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-03-04 · updated 2026-06-17
• Weakness: CWE-89

Description

The Email Subscribers by Icegram Express plugin for WordPress is vulnerable to SQL Injection via the 'workflow_ids' parameter in all versions up to, and including, 5.9.16 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 administrator-level access and above, to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database.

Affected products

• icegram Email Subscribers & Newsletters – Email Marketing, Post Notifications & Newsletter Plugin for WordPress: through 5.9.16

References

• https://downloads.wordpress.org/plugin/email-subscribers.5.9.15.zip
• https://gist.github.com/stevenyu113228/6c5c3f660e6dc739768842c051028f40
• https://plugins.trac.wordpress.org/browser/email-subscribers/tags/5.9.15/lite/includes/workflows/db/class-es-db-workflows.php#L379
• https://plugins.trac.wordpress.org/browser/email-subscribers/trunk/lite/includes/workflows/db/class-es-db-workflows.php#L379
• https://plugins.trac.wordpress.org/changeset/3464881/
• https://www.wordfence.com/threat-intel/vulnerabilities/id/d8dc995d-912e-4d83-84cc-c99242022b82?source=cve
• https://gist.github.com/stevenyu113228/6c5c3f660e6dc739768842c051028f40

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