CVE-2020-37168

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-05-13. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Elevated
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 9.8Exploit: NoneExposed: 0

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

Ecommerce Systempay 1.0 contains a weak cryptographic implementation vulnerability that allows attackers to brute force the 16-character production secret key used for payment signature generation. Attackers can extract payment form data and signatures from POST requests to the payment endpoint, then use SHA1 hash comparison to iteratively test key candidates until discovering the correct production key, enabling them to forge valid payment signatures and manipulate transaction amounts.

CVSS v3
9.8
EG Score
9.8(medium)
EPSS
16.0%
KEV
Not listed

Published

May 13, 2026

Last Modified

May 13, 2026

Advisory Details (4)

Auto-updated Jun 21, 2026
No patch confirmed yet.
generic

Ecommerce Systempay 1.0 Production Key Brute Force | Advisories | VulnCheck

https://www.vulncheck.com/advisories/ecommerce-systempay-production-key-brute-force
generic
https://paiement.systempay.fr/doc/fr-FR/module-de-paiement-gratuit/
generic
https://paiement.systempay.fr/doc/fr-FR/
generic🟡 PoC Available

Ecommerce Systempay 1.0 - Production KEY Brute Force - PHP webapps Exploit

https://www.exploit-db.com/exploits/48017

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 10× in last 7d / 48× 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 235 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2020-37168?
CVE-2020-37168 is a critical vulnerability published on May 13, 2026. Ecommerce Systempay 1.0 contains a weak cryptographic implementation vulnerability that allows attackers to brute force the 16-character production secret key used for payment signature generation. Attackers can extract payment form data and signatures from POST requests to the payment endpoint,…
When was CVE-2020-37168 disclosed?
CVE-2020-37168 was first published in the National Vulnerability Database on May 13, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2020-37168 actively exploited?
CVE-2020-37168 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 16.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2020-37168?
CVE-2020-37168 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2020-37168?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-37168, 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.

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