CVE-2020-24391

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 75% (99th percentile of EPSS-scored CVEs). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Elevated
9.8EG
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • High exploitation likelihood — EPSS 75%
CISA-KEV: Not listedEPSS PROB: 75%CVSS: 9.8Exploit: Elevated riskExposed services: Not assessed

A fix is available — apply it.

mongo-express before 1.0.0 offers support for certain advanced syntax but implements this in an unsafe way. NOTE: this may overlap CVE-2019-10769.

CVSS v3
9.8
EG Score
9.8CRITICALmedium confidence
EG Risk
78
EG Risk 78/100CISA 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
Severity98% × 45%
Exploitation75% × 40%
Automatability30% × 15%
CISA SSVC: Track at low, Track* at medium and Attend at high mission impact.
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
75%
EPSS %ILE
99th
KEV
Not listed

CISA SSVCTrack at low, Track* at medium and Attend at high mission impact.

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

Exploitation public PoC (EG-KEV: elevated) · Automatable unknown (not published for this CVE) · Technical impact total (CVSS ≥ 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

March 30, 2021

Last Modified

November 21, 2024

Advisory Details (1)

Auto-updated Oct 4, 2026
Patch available. Sources: github_commit.
github_commit Patch Available

commit 3a26b079e782 (mongo-express/mongo-express)

Patch available: mongo-express/mongo-express v1.0.0-alpha.3 (contains commit 3a26b079e782)

https://github.com/mongo-express/mongo-express/commit/3a26b079e7821e0e209c3ee0cc2ae15ad467b91a

Affected Packages

(1 across 1 ecosystem)
npm(1)
PackageVulnerable rangeFix by version rangeDependents
mongodb-query-parser—
  • every version up to 2.0.0: fixed in 2.0.0
—

Data Freshness Timeline

(refreshed 2× in last 7d / 18× 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.

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

Publicly available exploits

(1 reference)

Working exploit code is in the public domain. Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Nucleihttp/cves/2020/CVE-2020-24391.yaml
    First seen Jan 1, 2020

    Mongo-Express - Remote Code Execution

    Open source ↗

Frequently asked(5)

What is CVE-2020-24391?
CVE-2020-24391 is a critical vulnerability published on March 30, 2021. mongo-express before 1.0.0 offers support for certain advanced syntax but implements this in an unsafe way. NOTE: this may overlap CVE-2019-10769.
When was CVE-2020-24391 disclosed?
CVE-2020-24391 was first published on March 30, 2021, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2020-24391 actively exploited?
CVE-2020-24391 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 75% probability of exploitation in the next 30 days (99th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2020-24391?
CVE-2020-24391 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2020-24391?
A fix for CVE-2020-24391 is available: update to the fixed version the vendor names in its advisory.

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