CVE-2026-17567
Description
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.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
Propose a mitigation on Community Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
References
- https://plugins.trac.wordpress.org/browser/fluentform/tags/6.2.4/app/Modules/Payments/PaymentHandler.php#L218
- 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/6.2.4/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/6.2.8/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/changeset/3625751/fluentform/trunk/app/Modules/Payments/PaymentMethods/BaseProcessor.php
- https://plugins.trac.wordpress.org/changeset?old_path=%2Ffluentform/tags/6.2.8&new_path=%2Ffluentform/tags/6.2.9
- https://www.wordfence.com/threat-intel/vulnerabilities/id/565980d7-8dc9-42a4-90c5-2f75af52fb8e?source=cve
CWEs
CWE-639
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.