CVE-2026-78468 Overview
CVE-2026-78468 is a SQL Injection vulnerability in the FluentCRM Pro plugin for WordPress. The plugin provides email newsletter, automation, marketing, campaigns, opt-ins, leads, and CRM functionality. All versions up to and including 3.1.12 are affected. The flaw stems from insufficient escaping on a user-supplied parameter combined with inadequate query preparation. Authenticated attackers with Author-level access or higher can append additional SQL queries to existing statements and extract sensitive database information.
Critical Impact
Authenticated attackers with Author-level privileges can exfiltrate sensitive data, including credentials and CRM records, from the WordPress database.
Affected Products
- FluentCRM Pro plugin for WordPress, all versions through 3.1.12
- WordPress sites with FluentCRM Pro installed and active
- Any environment allowing Author-level or higher user registration on affected installs
Discovery Timeline
- 2026-08-25 - CVE-2026-78468 published to NVD
- 2026-08-26 - Last updated in NVD database
Technical Details for CVE-2026-78468
Vulnerability Analysis
The vulnerability is a classic SQL Injection flaw classified under [CWE-89]. FluentCRM Pro processes user-supplied input into a SQL statement without sufficient escaping or parameterization. Attackers can break out of the intended query context and append arbitrary SQL. Successful exploitation returns confidential data from the underlying database, including WordPress user records, session tokens, and CRM subscriber information.
Exploitation requires authentication at Author level or above. WordPress sites that permit self-registration or that operate with multiple content contributors expand the attack surface. The attack vector is network-based and requires no user interaction beyond the authenticated session.
Root Cause
The root cause is improper neutralization of special elements used in a SQL command. The affected code path accepts a request parameter and concatenates it into a SQL query without invoking $wpdb->prepare() or an equivalent parameterized query mechanism. This absence of query preparation allows attacker-controlled syntax to alter query semantics.
Attack Vector
An authenticated user submits a crafted parameter through an exposed FluentCRM Pro endpoint. The parameter is embedded into a SELECT statement without escaping. Attackers use UNION-based or boolean-based techniques to append subqueries that read from arbitrary tables. Data returned in HTTP responses reveals database contents. See the Wordfence Vulnerability Report for technical specifics.
// Verified exploitation code not publicly available.
// Refer to the Wordfence advisory for technical detail.
Detection Methods for CVE-2026-78468
Indicators of Compromise
- Web server access logs containing SQL syntax such as UNION SELECT, SLEEP(, or INFORMATION_SCHEMA in requests to FluentCRM Pro endpoints under /wp-admin/admin-ajax.php or plugin routes.
- Unexpected read activity against wp_users, wp_usermeta, or FluentCRM tables originating from Author-level accounts.
- Anomalous response sizes or timing on plugin AJAX endpoints correlated with authenticated Author sessions.
Detection Strategies
- Deploy web application firewall rules that identify SQL metacharacters and typical injection payloads in requests to FluentCRM Pro endpoints.
- Enable WordPress database query logging and alert on queries referencing wp_users from plugin contexts that should not access authentication tables.
- Correlate authenticated Author-level session activity with error responses containing MySQL error strings such as You have an error in your SQL syntax.
Monitoring Recommendations
- Monitor account creation and role changes for unexpected Author-level or higher assignments.
- Track outbound traffic from the WordPress host for signs of bulk data exfiltration following FluentCRM endpoint activity.
- Review authentication logs for compromised or newly registered contributor accounts making frequent plugin API calls.
How to Mitigate CVE-2026-78468
Immediate Actions Required
- Update FluentCRM Pro to a version newer than 3.1.12 as soon as a patched release is available from the vendor.
- Audit WordPress user roles and remove or downgrade unnecessary Author-level and higher accounts.
- Rotate credentials, API keys, and session tokens if exploitation is suspected on the affected installation.
Patch Information
Refer to the FluentCRM Official Website and the Wordfence Vulnerability Report for the current fixed version and vendor guidance. Apply the patched release across all WordPress environments running FluentCRM Pro.
Workarounds
- Restrict Author-level and higher role assignments to trusted users only and disable open registration.
- Deploy a WordPress-aware WAF with SQL Injection signatures tuned for plugin endpoints until the patch is applied.
- Isolate the WordPress database account so that plugin queries cannot read from unrelated schemas or tables.
# Example: identify FluentCRM Pro version on a WordPress host
wp plugin get fluentcampaign-pro --field=version
# Example: force update once a patched release is available
wp plugin update fluentcampaign-pro
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
