WPManageNinja Fluent Forms Pro Plugin 6.2.7 License Sync fluentformpro.php backdoor

Summaryinfo

A vulnerability categorized as problematic has been discovered in WPManageNinja Fluent Forms Pro Plugin 6.2.7. This vulnerability affects unknown code of the file fluentformpro.php of the component License Sync. Executing a manipulation can lead to backdoor. This vulnerability is handled as CVE-2026-73532. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability classified as problematic was found in WPManageNinja Fluent Forms Pro Plugin 6.2.7. This vulnerability affects an unknown functionality of the file fluentformpro.php of the component License Sync. The manipulation with an unknown input leads to a backdoor vulnerability. The CWE definition for the vulnerability is CWE-912. The product contains functionality that is not documented, not part of the specification, and not accessible through an interface or command sequence that is obvious to the product's users or administrators. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is shared for download at wpmanageninja.com. This vulnerability was named CVE-2026-73532 since 08/12/2026. The exploitation appears to be easy. The attack can be initiated remotely. The exploitation needs additional levels of successful authentication. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 08/13/2026). The MITRE ATT&CK project declares the attack technique as T1588.001.

By approaching the search of inurl:fluentformpro.php it is possible to find vulnerable targets with Google Hacking.

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

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Vendor

• WPManageNinja

Name

• Fluent Forms Pro Plugin

Version

• 6.2.7

CPE 2.3info

• 🔒

CPE 2.2info

• 🔒

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Discussion