CVE-2026-17567

MEDIUMPre-NVD 5.35.3—
EchelonGraph scoreMEDIUM 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: 0.6%CVSS: 5.3Exploit: None knownExposed services: Not assessed

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

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
5.3MEDIUMmedium confidence
EG Risk
39
EG Risk 39/100CISA SSVC

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%
Exploitation1% × 40%
Automatability100% × 15%
CISA SSVC: Track at low or medium mission impact; Attend at high (mission-essential systems).
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.
EPSS PROB
0.6%
EPSS %ILE
48th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Attend at high (mission-essential systems).

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

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 14× in last 7d / 60× 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.

Showing the most recent 100 of 162 total refreshes for this CVE.

  1. 2026-10-04 23:21 UTCEPSS rescore
  2. 2026-10-04 06:32 UTCEG score recompute
  3. 2026-10-04 06:32 UTCGHSA enrichment
  4. 2026-10-03 14:25 UTCEPSS rescore
  5. 2026-10-02 16:51 UTCEG score recompute
  6. 2026-10-02 16:51 UTCGHSA enrichment
  7. 2026-10-01 19:49 UTCEPSS rescore
  8. 2026-10-01 02:48 UTCEG score recompute
  9. 2026-10-01 02:48 UTCGHSA enrichment
  10. 2026-09-30 15:02 UTCEPSS rescore
  11. 2026-09-29 15:20 UTCEPSS rescore
  12. 2026-09-29 06:50 UTCEG score recompute
  13. 2026-09-29 06:50 UTCGHSA enrichment
  14. 2026-09-28 13:51 UTCEPSS rescore
  15. 2026-09-27 18:56 UTCEG score recompute
  16. 2026-09-27 18:56 UTCGHSA enrichment
  17. 2026-09-27 13:47 UTCEPSS rescore
  18. 2026-09-26 15:58 UTCEPSS rescore
  19. 2026-09-25 04:53 UTCEG score recompute
  20. 2026-09-25 04:53 UTCGHSA enrichment
  21. 2026-09-23 16:46 UTCEG score recompute
  22. 2026-09-23 16:46 UTCGHSA enrichment
  23. 2026-09-22 13:18 UTCEG score recompute
  24. 2026-09-22 13:18 UTCGHSA enrichment
  25. 2026-09-20 04:14 UTCEG score recompute
Show 75 more
  1. 2026-09-20 04:14 UTCGHSA enrichment
  2. 2026-09-19 04:06 UTCEG score recompute
  3. 2026-09-19 04:06 UTCGHSA enrichment
  4. 2026-09-18 19:27 UTCEPSS rescore
  5. 2026-09-18 01:17 UTCEG score recompute
  6. 2026-09-18 01:17 UTCGHSA enrichment
  7. 2026-09-16 14:07 UTCEPSS rescore
  8. 2026-09-16 11:20 UTCEG score recompute
  9. 2026-09-16 11:20 UTCGHSA enrichment
  10. 2026-09-16 05:14 UTCEPSS rescore
  11. 2026-09-15 08:05 UTCEG score recompute
  12. 2026-09-15 08:05 UTCGHSA enrichment
  13. 2026-09-14 07:50 UTCEG score recompute
  14. 2026-09-14 07:50 UTCGHSA enrichment
  15. 2026-09-13 16:46 UTCEPSS rescore
  16. 2026-09-13 07:42 UTCEG score recompute
  17. 2026-09-13 07:42 UTCGHSA enrichment
  18. 2026-09-12 15:00 UTCEPSS rescore
  19. 2026-09-12 07:34 UTCEG score recompute
  20. 2026-09-12 07:34 UTCGHSA enrichment
  21. 2026-09-11 14:52 UTCEPSS rescore
  22. 2026-09-11 09:36 UTCEPSS rescore
  23. 2026-09-11 07:23 UTCEG score recompute
  24. 2026-09-11 07:23 UTCGHSA enrichment
  25. 2026-09-10 09:34 UTCEPSS rescore
  26. 2026-09-10 07:14 UTCGHSA enrichment
  27. 2026-09-09 07:06 UTCEG score recompute
  28. 2026-09-09 07:05 UTCGHSA enrichment
  29. 2026-09-08 22:00 UTCEPSS rescore
  30. 2026-09-07 19:34 UTCEG score recompute
  31. 2026-09-07 19:34 UTCGHSA enrichment
  32. 2026-09-07 16:01 UTCEPSS rescore
  33. 2026-09-06 13:47 UTCEPSS rescore
  34. 2026-09-06 11:41 UTCEG score recompute
  35. 2026-09-06 11:41 UTCGHSA enrichment
  36. 2026-09-05 11:30 UTCEG score recompute
  37. 2026-09-05 11:30 UTCGHSA enrichment
  38. 2026-09-04 11:21 UTCEG score recompute
  39. 2026-09-04 11:21 UTCGHSA enrichment
  40. 2026-09-04 05:06 UTCEPSS rescore
  41. 2026-09-03 09:13 UTCEG score recompute
  42. 2026-09-03 09:13 UTCGHSA enrichment
  43. 2026-09-02 14:11 UTCEPSS rescore
  44. 2026-09-01 23:36 UTCEG score recompute
  45. 2026-09-01 23:36 UTCGHSA enrichment
  46. 2026-09-01 13:53 UTCEPSS rescore
  47. 2026-09-01 04:39 UTCEPSS rescore
  48. 2026-08-31 23:26 UTCGHSA enrichment
  49. 2026-08-30 22:31 UTCEG score recompute
  50. 2026-08-30 22:31 UTCGHSA enrichment
  51. 2026-08-30 19:17 UTCEPSS rescore
  52. 2026-08-30 01:22 UTCEPSS rescore
  53. 2026-08-29 22:22 UTCEG score recompute
  54. 2026-08-29 22:22 UTCGHSA enrichment
  55. 2026-08-28 21:41 UTCEPSS rescore
  56. 2026-08-27 23:45 UTCEG score recompute
  57. 2026-08-27 23:45 UTCGHSA enrichment
  58. 2026-08-27 14:25 UTCEPSS rescore
  59. 2026-08-26 23:31 UTCEG score recompute
  60. 2026-08-26 23:31 UTCGHSA enrichment
  61. 2026-08-26 14:46 UTCEPSS rescore
  62. 2026-08-25 23:22 UTCEG score recompute
  63. 2026-08-25 23:22 UTCGHSA enrichment
  64. 2026-08-25 13:48 UTCEPSS rescore
  65. 2026-08-24 23:04 UTCEG score recompute
  66. 2026-08-24 23:04 UTCGHSA enrichment
  67. 2026-08-23 22:55 UTCEG score recompute
  68. 2026-08-23 22:55 UTCGHSA enrichment
  69. 2026-08-23 00:19 UTCEPSS rescore
  70. 2026-08-22 22:38 UTCEG score recompute
  71. 2026-08-22 22:38 UTCGHSA enrichment
  72. 2026-08-21 23:49 UTCEPSS rescore
  73. 2026-08-21 22:30 UTCEG score recompute
  74. 2026-08-21 22:30 UTCGHSA enrichment
  75. 2026-08-20 22:55 UTCEPSS rescore

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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 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 0.6% probability of exploitation in the next 30 days (48th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-17567?
CVE-2026-17567 has a CVSS base score of 5.3 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-17567?
No fix for CVE-2026-17567 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-17567 are linked in the Vendor Advisories panel on this page.

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