PatchSiren cyber security CVE debrief
CVE-2026-17567 wpmanageninja CVE debrief
The Fluent Forms plugin for WordPress, specifically versions up to and including 6.2.8, is vulnerable to Insecure Direct Object Reference (IDOR) attacks. This vulnerability is caused by a lack of proper validation on user-controlled keys, specifically the 'transaction' parameter. As a result, unauthenticated attackers can brute-force valid transaction hashes and gain access to sensitive payment receipt data. This data may include customer names, email addresses, billing addresses, order items, payment methods, and payment statuses belonging to other users. The effective brute-force space for attackers is approximately 900 candidates per second per (submission, form) pair, making exploitation practical without prior authentication or account access. Organizations using this plugin, especially those handling sensitive payment information, should prioritize patching to version 6.2.9 or later to prevent potential exposure of sensitive payment receipt data. This includes reviewing current deployments, updating affected systems, and monitoring for suspicious activity related to transaction hashes and payment receipt data access. Evidence supporting this vulnerability is based on public CVE and NVD details, highlighting the need for defenders to verify affected versions, review transaction handling, and monitor for suspicious activity related to transaction hashes.
- Vendor
- wpmanageninja
- Product
- Fluent Forms – Customizable Contact Forms, Survey, Quiz, & Conversational Form Builder
- CVSS
- MEDIUM 5.3
- CISA KEV
- Not listed in stored evidence
- Original CVE published
- 2026-07-31
- Original CVE updated
- 2026-07-31
- Advisory published
- 2026-07-31
- Advisory updated
- 2026-07-31
Who should care
Organizations using the Fluent Forms plugin for WordPress, especially those handling sensitive payment information, should prioritize patching to prevent potential exposure of sensitive payment receipt data. This includes reviewing current deployments, updating affected systems, and monitoring for suspicious activity related to transaction hashes and payment receipt data access.
Technical summary
The Fluent Forms plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 6.2.8 via the 'transaction' parameter. This allows 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.
Defensive priority
Organizations using the Fluent Forms plugin for WordPress should prioritize patching to prevent potential exposure of sensitive payment receipt data.
Recommended defensive actions
- Patch the Fluent Forms plugin to version 6.2.9 or later
- Review and update payment receipt data access controls
- Monitor for suspicious activity related to transaction hashes
- Perform a thorough review of current deployments to identify and update affected systems
- Verify the implementation of compensating controls for exposed systems while remediation is scheduled and verified
- Check relevant monitoring, detection, and logs for exposed assets that need extra review
- Track exceptions, retest remediated assets, and close the item only after evidence is documented
Evidence notes
The Fluent Forms plugin for WordPress is vulnerable to Insecure Direct Object Reference due to missing validation on a user-controlled key. This allows unauthenticated attackers to brute-force valid transaction hashes and view sensitive payment receipt data. Evidence is limited to public CVE and NVD details. Defenders should verify affected versions, review transaction handling, and monitor for suspicious activity related to transaction hashes.
Official resources
AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-07-31T11:17:05.697Z and has not been modified since then.