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CVE-2026-73532— Fluent Forms Pro 6.2.7 Embedded Malicious Code via Tampered Plugin Build

Quick assessment

Affected
WPManageNinja Fluent Forms Pro
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Fluent Forms Pro 6.2.7 存在一个嵌入式恶意代码漏洞，该漏洞源于通过已停用的更新服务器提供的被篡改的插件版本。此篡改版本引入了一个非法的 PHP 文件（libs/class-license-sync.php），该文件通过添加到 fluentformpro.php 中的 require_once 指令加载，从而建立了一个后门 REST API 端点，在 mu-plugins 和 uploads 目录中持久化部署 PHP 文件，创建了一个无需密码即可登录的管理员账户，并注册了即使在插件卸载后仍能持续

CVSS 9.8 · Critical EPSS 0.67% · P50

Affected Version Matrix 1

VendorProduct Version RangeStatus
WPManageNinja Fluent Forms Pro 6.2.7 affected
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I. Basic Information for CVE-2026-73532

Vulnerability Information
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Vulnerability Title
Fluent Forms Pro 6.2.7 Embedded Malicious Code via Tampered Plugin Build
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
内嵌的恶意代码
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
WPManageNinja Fluent Forms Pro 6.2.7 -

II. Public POCs for CVE-2026-73532

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III. Intelligence Information for CVE-2026-73532

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Vendor Advisories for CVE-2026-73532 (1)

News Coverage for CVE-2026-73532 (1)

Same Patch Batch · WPManageNinja · 2026-08-13 · 4 CVEs total

CVE-2026-73533 9.8 CRITICAL Ninja Tables Pro 5.2.11 Embedded Malicious Code via Tampered Plugin Build
CVE-2026-18146 7.2 HIGH Fluent Forms <= 6.2.11 - Unauthenticated Stored Cross-Site Scripting via Notification Smar
CVE-2026-66467 6.5 MEDIUM WordPress FluentCommunity plugin <= 2.7.5 - Cross Site Scripting (XSS) vulnerability

IV. Related Vulnerabilities

Same vendor: WPManageNinja
Same weakness: CWE-506

V. Comments for CVE-2026-73532

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