CVE-2026-17567: Fluent Forms (WordPress plugin) · Insecure Direct Object Reference
Affects Fluent Forms (WordPress plugin)Source CVE Database V5
Not known to be exploited · CVSS 5.3 Medium.
Data as of 30 Oct 2026, 06:59 UTC
- EPSS
- 0.6% chance of exploitation in 30 days – higher than 49% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:NExploitation evidence
Disclosed: evidence found.
CVE published 31 Jul 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| wpmanageninjaFluent Forms – Customizable Contact Forms, Survey, Quiz, & Conversational Form Builder | Affected
| Fixed in– |
AI-suggested
Until an official fix is available, restrict access to the affected plugin or disable it if possible. Monitor for updates from the vendor wpmanageninja regarding patches or mitigations addressing this vulnerability.
Description
The Fluent Forms WordPress plugin up to version 6.2.8 contains an authorization bypass vulnerability via the 'transaction' parameter. This flaw allows unauthenticated attackers to brute-force transaction hashes and access sensitive payment receipt data of other users, including personal and payment details. The vulnerability arises from missing validation on a user-controlled key, enabling insecure direct object reference attacks. The brute-force attack is practical due to a limited candidate space of about 900 possibilities per second per submission and form pair.
References
- wordfence.com/threat-intel/vulnerabilities/id/565980d7-8dc9-42a4-90c5-2f75af52fb8e?source=cve (opens in a new tab)
- plugins.trac.wordpress.org/browser/fluentform/tags/6.2.4/app/Modules/Payments/PaymentMethods/BaseProcessor.php (opens in a new tab)
- plugins.trac.wordpress.org/browser/fluentform/tags/6.2.8/app/Modules/Payments/PaymentMethods/BaseProcessor.php (opens in a new tab)
- plugins.trac.wordpress.org/browser/fluentform/tags/6.2.8/app/Modules/Payments/TransactionShortcodes.php (opens in a new tab)
- plugins.trac.wordpress.org/browser/fluentform/tags/6.2.8/app/Modules/Payments/PaymentHandler.php (opens in a new tab)
- plugins.trac.wordpress.org/browser/fluentform/tags/6.2.4/app/Modules/Payments/TransactionShortcodes.php (opens in a new tab)
- plugins.trac.wordpress.org/browser/fluentform/tags/6.2.4/app/Modules/Payments/PaymentHandler.php (opens in a new tab)
- plugins.trac.wordpress.org/changeset?old_path=%2Ffluentform/tags/6.2.8&new_path=%2Ffluentform/tags/6.2.9 (opens in a new tab)
- plugins.trac.wordpress.org/changeset/3625751/fluentform/trunk/app/Modules/Payments/PaymentMethods/BaseProcessor.php (opens in a new tab)