CVE-2021-47978

MEDIUMNVD 6.26.2—
EchelonGraph scoreMEDIUM confidence

Score 6.2 from GitHub Security Advisory published 2026-05-16. NVD baseline CVSS 6.2; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Elevated
6.2
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 1%CVSS: 6.2Exploit: NoneExposed: 0

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

ProcessMaker 3.5.4 contains a local file inclusion vulnerability that allows unauthenticated attackers to read arbitrary files by exploiting improper path traversal validation. Attackers can send requests with directory traversal sequences to access sensitive system files like /etc/passwd without authentication.

CVSS v3
6.2
EG Score
6.2(medium)
EPSS
51.5%
KEV
Not listed

Published

May 16, 2026

Last Modified

May 18, 2026

Advisory Details (3)

Auto-updated May 16, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic

ProcessMaker 3.5.4 Local File Inclusion via Path Traversal | Advisories | VulnCheck

https://www.vulncheck.com/advisories/processmaker-local-file-inclusion-via-path-traversal
generic

ProcessMaker | Business Process Automation | Workflow Automation

https://www.processmaker.com/
generic🟡 PoC Available

ProcessMaker 3.5.4 - Local File inclusion - Multiple webapps Exploit

https://www.exploit-db.com/exploits/50229

Vendor Advisories for CVE-2021-47978(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 12× in last 7d / 66× 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 156 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2021-47978?
CVE-2021-47978 is a medium vulnerability published on May 16, 2026. ProcessMaker 3.5.4 contains a local file inclusion vulnerability that allows unauthenticated attackers to read arbitrary files by exploiting improper path traversal validation. Attackers can send requests with directory traversal sequences to access sensitive system files like /etc/passwd without…
When was CVE-2021-47978 disclosed?
CVE-2021-47978 was first published in the National Vulnerability Database on May 16, 2026, with the most recent update on May 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2021-47978 actively exploited?
CVE-2021-47978 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 51.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2021-47978?
CVE-2021-47978 has a CVSS v3 base score of 6.2 (NVD).
How do I remediate CVE-2021-47978?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-47978, 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

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