CVE-2021-47986

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-06-26. A secondary CVSS source baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 7.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Parse Server before 4.10.0 contains a supply chain vulnerability where incorrect version tags were pushed to the repository linking to unreviewed code in a personal fork. Attackers could exploit this by specifying affected version tags in dependency declarations to execute unreviewed and potentially malicious code.

CVSS v3
7.5
EG Score
7.5HIGHmedium confidence
EG Risk
38
EG Risk 38/100CISA 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
Severity75% × 45%
Exploitation0% × 40%
Automatability30% × 15%
CISA SSVC: Track at low or medium mission impact; Track or Attend at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.2%
EPSS %ILE
6th
KEV
Not listed

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

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact partial (CVSS below 9.0). 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

June 25, 2026

Last Modified

July 30, 2026

Advisory Details (2)

Auto-updated Jun 25, 2026
Patch available. Sources: github.
generic

Parse Server - Unreviewed Code Execution via Malicious Version Tags | Advisories | VulnCheck

https://www.vulncheck.com/advisories/parse-server-unreviewed-code-execution-via-malicious-version-tags
githubMentions a patch (unverified)

Incorrect version tags linked to external repository · Advisory · parse-community/parse-server · GitHub

https://github.com/parse-community/parse-server/security/advisories/GHSA-593v-wcqx-hq2w

Vendor Advisories for CVE-2021-47986(1)

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

Affected Packages

(1 across 1 ecosystem)
npm(1)
PackageVulnerable rangeFix by version rangeDependents
parse-server—
  • 4.0.0 up to 4.5.2: fixed in 4.5.2
  • 4.6.0 up to 4.10.0: fixed in 4.10.0
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 39× 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 253 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2021-47986?
CVE-2021-47986 is a high vulnerability published on June 25, 2026. Parse Server before 4.10.0 contains a supply chain vulnerability where incorrect version tags were pushed to the repository linking to unreviewed code in a personal fork. Attackers could exploit this by specifying affected version tags in dependency declarations to execute unreviewed and…
When was CVE-2021-47986 disclosed?
CVE-2021-47986 was first published on June 25, 2026, with the most recent update on July 30, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2021-47986 actively exploited?
CVE-2021-47986 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (6th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2021-47986?
CVE-2021-47986 has a CVSS base score of 7.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2021-47986?
A fix for CVE-2021-47986 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2021-47986 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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