CVE-2021-47978

MEDIUMNVD 6.26.2
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to NVD's CVSS score.

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, GitHub Security Advisory, NVD CVSS v3
Elevated
6.2EG
EchelonGraph verdictPlan mitigationRemediate within your standard update timelines (the SSVC decision on this page).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 0.8%CVSS: 6.2Exploit: No code on recordExposed services: Not assessed

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

The CVE record's CNA (VulnCheck) lists ProcessMaker versions up to and including 3.5.4 as affected. No release containing a fix is confirmed on record.

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
6.2MEDIUMmedium confidence
EG Risk
44
EG Risk 44/100

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 (value × EchelonGraph’s weight)
Severity62% × 45%
The EG Score, 6.2 of 10.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.
EPSS PROB
0.8%
EPSS %ILE
54th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* 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, and watch the vendor's advisory for the fix.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

May 16, 2026

Last Modified

May 18, 2026

Advisory Details (3)

Auto-updated May 16, 2026
No fix on record yet.
Web page

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

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

ProcessMaker | Business Process Automation | Workflow Automation

https://www.processmaker.com/
Web page

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 9× in last 7d / 29× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 97 of 263 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 3 repeat rows among the latest 100 are merged into the row they repeat. The 166 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-12 19:04 UTCEG score recompute
  2. 2026-10-12 16:30 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  3. 2026-10-11 23:30 UTCEG score recompute
  4. 2026-10-11 13:44 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  5. 2026-10-10 19:56 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  6. 2026-10-09 20:04 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  7. 2026-10-08 16:40 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  8. 2026-10-07 23:45 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  9. 2026-10-06 15:14 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  10. 2026-10-05 17:40 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  11. 2026-10-04 23:19 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  12. 2026-10-03 14:22 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  13. 2026-10-02 16:23 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  14. 2026-09-30 15:46 UTCEG score recompute
  15. 2026-09-30 15:00 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  16. 2026-09-29 15:15 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  17. 2026-09-28 13:47 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  18. 2026-09-26 15:54 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  19. 2026-09-26 00:21 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
  20. 2026-09-24 14:00 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
  21. 2026-09-23 13:45 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  22. 2026-09-22 14:44 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  23. 2026-09-21 20:28 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
  24. 2026-09-20 20:13 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  25. 2026-09-19 15:38 UTCEPSS rescoreEPSS 0.8% · 54th percentile
Show 72 more
  1. 2026-09-18 19:24 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  2. 2026-09-17 19:23 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  3. 2026-09-16 14:05 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  4. 2026-09-15 03:06 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
  5. 2026-09-12 14:57 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
  6. 2026-09-11 14:49 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
  7. 2026-09-11 09:33 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
  8. 2026-09-08 21:57 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
  9. 2026-09-07 15:58 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
  10. 2026-09-06 13:45 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
  11. 2026-09-05 15:25 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
  12. 2026-09-04 13:57 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
  13. 2026-09-04 05:03 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
  14. 2026-09-02 14:09 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
  15. 2026-09-01 13:51 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
  16. 2026-08-30 19:14 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
  17. 2026-08-30 01:19 UTCEPSS rescoreEPSS 0.8% · 52nd percentile
  18. 2026-08-28 21:38 UTCEPSS rescoreEPSS 0.8% · 52nd percentile
  19. 2026-08-27 14:22 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
  20. 2026-08-26 14:43 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
  21. 2026-08-25 13:46 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
  22. 2026-08-24 14:13 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
  23. 2026-08-23 17:21 UTCEG score recompute
  24. 2026-08-23 17:21 UTCGHSA enrichmentGHSA-c522-p4cv-rfpf · GitHub CVSS 6.2
  25. 2026-08-22 00:51 UTCEG score recompute
  26. 2026-08-22 00:51 UTCGHSA enrichmentGHSA-c522-p4cv-rfpf · GitHub CVSS 6.2
  27. 2026-08-21 23:46 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
  28. 2026-08-20 22:52 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
  29. 2026-08-20 19:14 UTCEG score recompute
  30. 2026-08-20 19:14 UTCGHSA enrichmentGHSA-c522-p4cv-rfpf · GitHub CVSS 6.2
  31. 2026-08-19 17:01 UTCEPSS rescoreEPSS 0.8% · 52nd percentile
  32. 2026-08-18 13:45 UTCEPSS rescoreEPSS 0.8% · 52nd percentile
  33. 2026-08-17 13:44 UTCEPSS rescoreEPSS 0.8% · 52nd percentile
  34. 2026-08-17 10:11 UTCEG score recompute
  35. 2026-08-17 10:11 UTCGHSA enrichmentGHSA-c522-p4cv-rfpf · GitHub CVSS 6.2
  36. 2026-08-16 14:53 UTCEPSS rescoreEPSS 0.8% · 52nd percentile
  37. 2026-08-16 03:43 UTCEG score recompute
  38. 2026-08-16 03:43 UTCGHSA enrichmentGHSA-c522-p4cv-rfpf · GitHub CVSS 6.2
  39. 2026-08-16 02:11 UTCEPSS rescoreEPSS 0.8% · 52nd percentile
  40. 2026-08-15 01:27 UTCEPSS rescoreEPSS 0.8% · 52nd percentile
  41. 2026-08-14 02:15 UTCEG score recompute
  42. 2026-08-14 02:15 UTCGHSA enrichmentGHSA-c522-p4cv-rfpf · GitHub CVSS 6.2
  43. 2026-08-13 21:57 UTCEPSS rescoreEPSS 0.8% · 52nd percentile
  44. 2026-08-12 14:43 UTCEG score recompute
  45. 2026-08-12 14:43 UTCGHSA enrichmentGHSA-c522-p4cv-rfpf · GitHub CVSS 6.2
  46. 2026-08-12 13:48 UTCEPSS rescoreEPSS 0.8% · 52nd percentile
  47. 2026-08-11 13:38 UTCEPSS rescoreEPSS 0.8% · 52nd percentile
  48. 2026-08-11 08:53 UTCEG score recompute
  49. 2026-08-11 08:53 UTCGHSA enrichmentGHSA-c522-p4cv-rfpf · GitHub CVSS 6.2
  50. 2026-08-10 06:58 UTCEG score recompute
  51. 2026-08-10 06:58 UTCGHSA enrichmentGHSA-c522-p4cv-rfpf · GitHub CVSS 6.2
  52. 2026-08-09 13:44 UTCEPSS rescoreEPSS 0.8% · 52nd percentile
  53. 2026-08-09 05:04 UTCEG score recompute
  54. 2026-08-09 05:04 UTCGHSA enrichmentGHSA-c522-p4cv-rfpf · GitHub CVSS 6.2
  55. 2026-08-08 16:34 UTCEPSS rescoreEPSS 0.8% · 52nd percentile
  56. 2026-08-08 03:10 UTCEG score recompute
  57. 2026-08-08 03:10 UTCGHSA enrichmentGHSA-c522-p4cv-rfpf · GitHub CVSS 6.2
  58. 2026-08-07 16:24 UTCEPSS rescoreEPSS 0.8% · 52nd percentile
  59. 2026-08-07 01:16 UTCEG score recompute
  60. 2026-08-07 01:16 UTCGHSA enrichmentGHSA-c522-p4cv-rfpf · GitHub CVSS 6.2
  61. 2026-08-06 13:44 UTCEPSS rescoreEPSS 0.8% · 52nd percentile
  62. 2026-08-05 21:27 UTCEG score recompute
  63. 2026-08-05 21:27 UTCGHSA enrichmentGHSA-c522-p4cv-rfpf · GitHub CVSS 6.2
  64. 2026-08-05 19:15 UTCEPSS rescoreEPSS 0.8% · 52nd percentile
  65. 2026-08-04 15:06 UTCEPSS rescoreEPSS 0.8% · 52nd percentile
  66. 2026-08-04 10:34 UTCEPSS rescoreEPSS 0.8% · 52nd percentile
  67. 2026-08-03 22:33 UTCEG score recompute
  68. 2026-08-03 22:33 UTCGHSA enrichmentGHSA-c522-p4cv-rfpf · GitHub CVSS 6.2
  69. 2026-08-03 10:33 UTCEPSS rescoreEPSS 0.8% · 52nd percentile
  70. 2026-08-02 20:39 UTCEG score recompute
  71. 2026-08-02 20:39 UTCGHSA enrichmentGHSA-c522-p4cv-rfpf · GitHub CVSS 6.2
  72. 2026-08-02 02:24 UTCEPSS rescoreEPSS 0.8% · 52nd percentile

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Frequently asked(5)

What is CVE-2021-47978?
CVE-2021-47978 is a medium-severity vulnerability; its CVE record was 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 made public?
CVE-2021-47978 was made public on April 16, 2021: that is the date its CVE record's CNA, VulnCheck, gives for when the vulnerability was made public. The CVE record itself was published on May 16, 2026. EchelonGraph's copy of the record carries a last-modified date of May 18, 2026; the record at its source may have been updated since.
Is CVE-2021-47978 actively exploited?
CVE-2021-47978 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.8% probability of exploitation in the next 30 days (54th percentile of EPSS-scored CVEs).
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?
No fix for CVE-2021-47978 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 CVE record's CNA (VulnCheck) lists ProcessMaker versions up to and including 3.5.4 as affected. No release containing a fix is confirmed on record. The vendor advisories EchelonGraph has for CVE-2021-47978 are linked in the Vendor Advisories panel on this page.

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