CVE-2020-7616

MEDIUMNVD 5.35.3—
EchelonGraph scoreMEDIUM confidence

Score 5.3 from GitHub Security Advisory published 2021-12-09. NVD baseline CVSS 5.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
5.3
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 1%CVSS: 5.3Exploit: NoneExposed: 0

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

express-mock-middleware through 0.0.6 is vulnerable to Prototype Pollution. Exported functions by the package can be tricked into adding or modifying properties of the Object.prototype. Exploitation of this vulnerability requires creation of a new directory where an attack code can be placed which will then be exported by express-mock-middleware. As such, this is considered to be a low risk.

CVSS v3
5.3
EG Score
5.3(medium)
EPSS
66.1%
KEV
Not listed

Published

April 7, 2020

Last Modified

November 21, 2024

References (4)

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
npmexpress-mock-middleware—ghsa

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(1 across 1 ecosystem)
npm(1)
PackageVulnerable rangeFixed inDependents
express-mock-middleware———

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 9× in last 7d / 46× 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. 2026-07-22 14:05 UTCEPSS rescore
  2. 2026-07-21 15:22 UTCEPSS rescore
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  21. 2026-07-09 19:07 UTCEPSS rescore
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  1. 2026-07-06 02:21 UTCEPSS rescore
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  6. 2026-07-02 16:57 UTCEPSS rescore
  7. 2026-07-01 15:03 UTCEPSS rescore
  8. 2026-06-30 23:20 UTCEPSS rescore
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  20. 2026-06-23 21:31 UTCEPSS rescore
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  22. 2026-06-22 14:23 UTCEPSS rescore
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  27. 2026-06-19 19:24 UTCEPSS rescore
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  29. 2026-06-18 17:51 UTCEPSS rescore
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  37. 2026-06-12 23:10 UTCEPSS rescore
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  39. 2026-06-11 13:58 UTCEPSS rescore
  40. 2026-06-11 13:58 UTCEPSS rescore
  41. 2026-06-10 22:16 UTCEPSS rescore
  42. 2026-06-10 13:20 UTCEPSS rescore
  43. 2026-06-08 14:15 UTCEPSS rescore
  44. 2026-06-07 15:23 UTCEPSS rescore
  45. 2026-06-07 15:23 UTCEPSS rescore
  46. 2026-06-06 13:46 UTCEPSS rescore
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  49. 2026-06-05 22:45 UTCEPSS rescore
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  51. 2026-06-05 06:08 UTCEPSS rescore
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  55. 2026-06-02 20:11 UTCEPSS rescore
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  67. 2026-05-27 05:31 UTCEG score recompute
  68. 2026-05-27 05:31 UTCGHSA enrichment
  69. 2026-05-26 13:42 UTCEPSS rescore
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  71. 2026-05-26 07:17 UTCEPSS rescore
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Frequently asked(5)

What is CVE-2020-7616?
CVE-2020-7616 is a medium vulnerability published on April 7, 2020. express-mock-middleware through 0.0.6 is vulnerable to Prototype Pollution. Exported functions by the package can be tricked into adding or modifying properties of the Object.prototype. Exploitation of this vulnerability requires creation of a new directory where an attack code can be placed which…
When was CVE-2020-7616 disclosed?
CVE-2020-7616 was first published in the National Vulnerability Database on April 7, 2020, 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-2020-7616 actively exploited?
CVE-2020-7616 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 66.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2020-7616?
CVE-2020-7616 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2020-7616?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-7616, 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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