CVE-2026-17567
Fluent Forms <= 6.2.8 - Unauthenticated Sensitive Information Exposure via Insecure Direct Object Reference and Weak Transaction Hash in 'transaction' Parameter
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.
INFO
Published Date :
July 31, 2026, 11:17 a.m.
Last Modified :
July 31, 2026, 11:17 a.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-17567
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update the Fluent Forms plugin to the latest version.
- Verify that sensitive data is protected.
- Monitor for unauthorized access.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-17567.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-17567 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-17567
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-17567 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-17567 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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New CVE Received by [email protected]
Jul. 31, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'wpmanageninja', 'product': 'Fluent Forms – Customizable Contact Forms, Survey, Quiz, & Conversational Form Builder', 'versions': [{'status': 'affected', 'version': '0', 'versionType': 'semver', 'lessThanOrEqual': '6.2.8'}], 'defaultStatus': 'unaffected'}] Added 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. Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N Added CWE CWE-639 Added Reference https://plugins.trac.wordpress.org/browser/fluentform/tags/6.2.4/app/Modules/Payments/PaymentHandler.php#L218 Added Reference https://plugins.trac.wordpress.org/browser/fluentform/tags/6.2.4/app/Modules/Payments/PaymentMethods/BaseProcessor.php#L959 Added Reference https://plugins.trac.wordpress.org/browser/fluentform/tags/6.2.4/app/Modules/Payments/TransactionShortcodes.php#L107 Added Reference https://plugins.trac.wordpress.org/browser/fluentform/tags/6.2.8/app/Modules/Payments/PaymentHandler.php#L218 Added Reference https://plugins.trac.wordpress.org/browser/fluentform/tags/6.2.8/app/Modules/Payments/PaymentMethods/BaseProcessor.php#L959 Added Reference https://plugins.trac.wordpress.org/browser/fluentform/tags/6.2.8/app/Modules/Payments/TransactionShortcodes.php#L107 Added Reference https://plugins.trac.wordpress.org/changeset/3625751/fluentform/trunk/app/Modules/Payments/PaymentMethods/BaseProcessor.php Added Reference https://plugins.trac.wordpress.org/changeset?old_path=%2Ffluentform/tags/6.2.8&new_path=%2Ffluentform/tags/6.2.9 Added Reference https://www.wordfence.com/threat-intel/vulnerabilities/id/565980d7-8dc9-42a4-90c5-2f75af52fb8e?source=cve