CVE-2026-17567

MEDIUMPre-NVD 5.35.3—
EchelonGraph scoreHIGH confidence

Score 5.3 from GitHub Security Advisory published 2026-07-31. a secondary CVSS source baseline 5.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
5.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.3Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
5.3
EG Score
5.3(high)
EG Risk
39(Track)
EG Risk 39/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity53% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
31%
KEV
Not listed

Published

July 31, 2026

Last Modified

August 12, 2026

References (9)

Vendor Advisories for CVE-2026-17567(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 20× in last 7d / 63× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-08-20 22:55 UTCEPSS rescore
  2. 2026-08-20 22:21 UTCGHSA enrichment
  3. 2026-08-19 22:13 UTCEG score recompute
  4. 2026-08-19 22:13 UTCGHSA enrichment
  5. 2026-08-19 17:03 UTCEPSS rescore
  6. 2026-08-18 22:02 UTCEG score recompute
  7. 2026-08-18 22:02 UTCGHSA enrichment
  8. 2026-08-18 13:48 UTCEPSS rescore
  9. 2026-08-17 21:54 UTCEG score recompute
  10. 2026-08-17 21:54 UTCGHSA enrichment
  11. 2026-08-17 13:47 UTCEPSS rescore
  12. 2026-08-16 21:46 UTCEG score recompute
  13. 2026-08-16 21:46 UTCGHSA enrichment
  14. 2026-08-16 14:56 UTCEPSS rescore
  15. 2026-08-16 02:14 UTCEPSS rescore
  16. 2026-08-15 21:37 UTCEG score recompute
  17. 2026-08-15 21:37 UTCGHSA enrichment
  18. 2026-08-15 01:30 UTCEPSS rescore
  19. 2026-08-14 21:28 UTCEG score recompute
  20. 2026-08-14 21:28 UTCGHSA enrichment
  21. 2026-08-13 22:00 UTCEPSS rescore
  22. 2026-08-13 21:19 UTCGHSA enrichment
  23. 2026-08-12 21:09 UTCEG score recompute
  24. 2026-08-12 21:09 UTCGHSA enrichment
  25. 2026-08-12 13:50 UTCEPSS rescore
Show 38 more
  1. 2026-08-12 02:09 UTCEG score recompute
  2. 2026-08-12 02:09 UTCGHSA enrichment
  3. 2026-08-11 13:42 UTCEPSS rescore
  4. 2026-08-11 02:01 UTCEG score recompute
  5. 2026-08-11 02:01 UTCGHSA enrichment
  6. 2026-08-11 00:00 UTCEPSS rescore
  7. 2026-08-10 01:52 UTCEG score recompute
  8. 2026-08-10 01:52 UTCGHSA enrichment
  9. 2026-08-09 13:46 UTCEPSS rescore
  10. 2026-08-09 01:44 UTCEG score recompute
  11. 2026-08-09 01:44 UTCGHSA enrichment
  12. 2026-08-08 16:37 UTCEPSS rescore
  13. 2026-08-08 01:35 UTCEG score recompute
  14. 2026-08-08 01:35 UTCGHSA enrichment
  15. 2026-08-07 01:27 UTCEG score recompute
  16. 2026-08-07 01:27 UTCGHSA enrichment
  17. 2026-08-06 13:46 UTCEPSS rescore
  18. 2026-08-06 01:19 UTCEG score recompute
  19. 2026-08-06 01:19 UTCGHSA enrichment
  20. 2026-08-05 19:17 UTCEPSS rescore
  21. 2026-08-05 01:11 UTCEG score recompute
  22. 2026-08-05 01:10 UTCGHSA enrichment
  23. 2026-08-04 15:10 UTCEPSS rescore
  24. 2026-08-04 10:38 UTCEPSS rescore
  25. 2026-08-04 00:59 UTCEG score recompute
  26. 2026-08-04 00:59 UTCGHSA enrichment
  27. 2026-08-03 10:35 UTCEPSS rescore
  28. 2026-08-03 00:50 UTCEG score recompute
  29. 2026-08-03 00:50 UTCGHSA enrichment
  30. 2026-08-02 02:26 UTCEPSS rescore
  31. 2026-08-02 00:42 UTCGHSA enrichment
  32. 2026-08-01 00:33 UTCEG score recompute
  33. 2026-08-01 00:32 UTCGHSA enrichment
  34. 2026-07-31 23:40 UTCEG score recompute
  35. 2026-07-31 23:40 UTCGHSA enrichment
  36. 2026-07-31 11:26 UTCEG score recompute
  37. 2026-07-31 10:18 UTCEG score recompute
  38. 2026-07-31 10:18 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-17567?
CVE-2026-17567 is a medium vulnerability published on July 31, 2026. 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…
When was CVE-2026-17567 disclosed?
CVE-2026-17567 was first published in the National Vulnerability Database on July 31, 2026, with the most recent update on August 12, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-17567 actively exploited?
CVE-2026-17567 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 69.0% of all scored CVEs.
What is the CVSS score of CVE-2026-17567?
CVE-2026-17567 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2026-17567?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-17567, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-17567

Explore →

Is Your Infrastructure Affected by CVE-2026-17567?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs