Authorization bypass in WP ManageNinja LLC Fluent Forms – Customizable Contact Forms…
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- Low · None · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-639.
Summary
The Fluent Forms – Customizable Contact Forms, Survey, Quiz, & Conversational Form Builder plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 6.2.8 via the 'transaction' parameter due to missing validation on a user controlled key. This makes it possible for unauthenticated attackers to brute-force valid transaction hashes and view sensitive payment receipt data including customer name, email address, billing address, order items, payment method, and payment status belonging to other users. Because submission ID, form ID, and transaction creation time are either observable or guessable by an attacker, the effective brute-force space is bounded to approximately 900 candidates per second per (submission, form) pair, making exploitation practical without any prior authentication or account.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| WP ManageNinja LLC | Fluent Forms – Customizable Contact Forms, Survey, Quiz, & Conversational Form Builder | up to 6.2.8 | — | No fix listed | CNA |
- Fluent Forms – Customizable Contact Forms, Survey, Quiz, & Conversational Form Builder VendorWP ManageNinja LLC Affected up to 6.2.8 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-17567
- 2026-10-03 Alias added: GHSA-gx6f-fm4p-x72r
- 2026-10-30 EPSS moved to the 50th–90th percentile
References
Other 9
- https://www.wordfence.com/threat-intel/vulnerabilities/id/565980d7-8dc9-42a4-90c5-2f75af52fb8e?source=cve
- https://plugins.trac.wordpress.org/browser/fluentform/tags/6.2.4/app/Modules/Payments/PaymentMethods/BaseProcessor.php#L959
- https://plugins.trac.wordpress.org/browser/fluentform/tags/6.2.8/app/Modules/Payments/PaymentMethods/BaseProcessor.php#L959
- https://plugins.trac.wordpress.org/browser/fluentform/tags/6.2.8/app/Modules/Payments/TransactionShortcodes.php#L107
- https://plugins.trac.wordpress.org/browser/fluentform/tags/6.2.8/app/Modules/Payments/PaymentHandler.php#L218
- https://plugins.trac.wordpress.org/browser/fluentform/tags/6.2.4/app/Modules/Payments/TransactionShortcodes.php#L107
- https://plugins.trac.wordpress.org/browser/fluentform/tags/6.2.4/app/Modules/Payments/PaymentHandler.php#L218
- https://plugins.trac.wordpress.org/changeset?old_path=%2Ffluentform/tags/6.2.8&new_path=%2Ffluentform/tags/6.2.9
- https://plugins.trac.wordpress.org/changeset/3625751/fluentform/trunk/app/Modules/Payments/PaymentMethods/BaseProcessor.php
More WP ManageNinja LLC vulnerabilities
- 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-2026-51632 Fluent Forms Pro 6.2.7 Embedded Malicious Code via Tampered Plugin Build CVSS 4.0CRITICAL 9.3
Sources
- CVE-2026-17567 · CVE Program
- CVE-2026-17567 · NVD
- FIRST EPSS
- GHSA-gx6f-fm4p-x72r · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences