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TI-2026-51632 Aliases CVE-2026-73532GHSA-f3v6-4mcw-wrqj

Fluent Forms Pro 6.2.7 Embedded Malicious Code via Tampered Plugin Build

Priority MEDIUM 49CWE-506Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-506.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00671 52nd percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
WP ManageNinja LLCFluent Forms Pro6.2.7 and later—No fix listedCNA
  • Fluent Forms Pro VendorWP ManageNinja LLC Affected 6.2.7 and later Fixed in — No fix listed CNA

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-73532
  2. 2026-10-03 Alias added: GHSA-f3v6-4mcw-wrqj

References

Advisory 1

Other 2

  • TI-2021-13634 CSRF in WP Fluent Forms < 3.6.67 allows stored XSS and Privilege Escalation CVSS 3.1HIGH 8.8
  • TI-2022-04342 FluentAuth < 1.0.2 - Bypass blocks by IP Spoofing CVSS 3.1HIGH 7.5
  • TI-2024-11836 Ninja Tables < 5.0.17 - Admin+ Stored XSS CVSS 3.1MEDIUM 6.1
  • TI-2023-00211 FluentSMTP < 2.2.3 - Stored XSS via Email Logs CVSS 3.1MEDIUM 5.4
  • TI-2026-51633 Ninja Tables Pro 5.2.11 Embedded Malicious Code via Tampered Plugin Build CVSS 4.0CRITICAL 9.3
  • TI-2026-74728 Privilege escalation in WordPress Fluent CRM plugin CVSS 3.1CRITICAL 9.8
See all 82 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences