CVE-2026-73532
Fluent Forms Pro 6.2.7 Embedded Malicious Code via Tampered Plugin Build
CVSS Score
9.8
EPSS Score
0.0%
EPSS Percentile
0th
Fluent Forms Pro 6.2.7 contains an embedded malicious code vulnerability introduced via a tampered plugin build served through a decommissioned update server. The tampered build introduced a rogue PHP file (libs/class-license-sync.php), loaded via a require_once directive added to fluentformpro.php, that established a backdoor REST API endpoint, dropped persistent PHP files in mu-plugins and uploads directories, installed a passwordless administrator account, and registered scheduled tasks that survived plugin removal.
| CWE | CWE-506 |
| Vendor | wpmanageninja |
| Product | fluent forms pro |
| Published | Aug 13, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
WPManageNinja / Fluent Forms Pro
6.2.7
References
wpmanageninja.com: https://wpmanageninja.com/security-incident-on-31-july-2026/ wordpress.org: https://wordpress.org/plugins/fluentform/ patchstack.com: https://patchstack.com/database/wordpress/plugin/fluentformpro/vulnerability/wordpress-fluent-forms-pro-add-on-pack-plugin-6-2-7-6-2-7-remote-code-execution-vulnerability vulncheck.com: https://www.vulncheck.com/advisories/fluent-forms-pro-embedded-malicious-code-via-tampered-plugin-build