CVE-2016-20001

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 1.2% (67th 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
9.8EG
EchelonGraph verdictPlan mitigationRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1.2%CVSS: 9.8Exploit: None knownExposed services: Not assessed

No fix has been recorded since the CVE record was published in 2021 — isolate the affected system (restrict network access to it, for example with a firewall, or keep it off the internet) or retire the product.

The REST/JSON project 7.x-1.x for Drupal allows node access bypass, aka SA-CONTRIB-2016-033. NOTE: This project is not covered by Drupal's security advisory policy.

CVSS v3
9.8
EG Score
9.8CRITICALmedium confidence
EG Risk
49
EG Risk 49/100

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)
Severity98% × 45%
The EG Score, 9.8 of 10.
Exploitation1% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability30% × 15%
EchelonGraph's default before algorithm v3.4: CISA had not published Automatable for this CVE.
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* or Attend at high (mission-essential systems).
Exploitation none (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact total (CVSS ≥ 9.0). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from 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 has been recorded since the CVE record was published in 2021. Isolate the affected system within your standard update timelines at low or medium mission impact and sooner than that at high (restrict network access to it, for example with a firewall, or keep it off the internet) or retire the product.
EPSS PROB
1.2%
EPSS %ILE
68th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* or Attend at high (mission-essential systems).

No fix has been recorded since the CVE record was published in 2021. Isolate the affected system within your standard update timelines at low or medium mission impact and sooner than that at high (restrict network access to it, for example with a firewall, or keep it off the internet) or retire the product.

Exploitation none (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact total (CVSS ≥ 9.0). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from 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

Published

January 1, 2021

Last Modified

November 21, 2024

Advisory Details (1)

Auto-updated Oct 7, 2026
No fix on record since 2021.
generic

REST JSON - Multiple Vulnerabilities - Highly Critical - Unsupported - SA-CONTRIB-2016-033 | Drupal.org

https://www.drupal.org/node/2744889

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 23× 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 87 of 131 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. 13 repeat rows among the latest 100 are merged into the row they repeat. The 44 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-11 13:40 UTCEPSS rescoreEPSS 1.2% · 68th percentile
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  10. 2026-10-01 19:43 UTCEPSS rescoreEPSS 1.2% · 67th percentile
  11. 2026-09-30 14:58 UTCEPSS rescoreEPSS 1.2% · 67th percentile
  12. 2026-09-30 09:11 UTCEG score recompute
  13. 2026-09-28 13:45 UTCEPSS rescoreEPSS 1.2% · 67th percentile
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  1. 2026-09-04 13:56 UTCEPSS rescoreEPSS 1.2% · 66th percentile
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  31. 2026-07-23 14:14 UTCEPSS rescoreEPSS 1.2% · 65th percentile
  32. 2026-07-23 01:22 UTCEG score recompute
  33. 2026-07-22 22:01 UTCEG score recompute
  34. 2026-07-22 14:04 UTCEPSS rescoreEPSS 1.2% · 65th percentile
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  62. 2026-06-21 14:54 UTCEPSS rescoreEPSS 1.2% · 63rd percentile

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2016-20001?
CVE-2016-20001 is a critical-severity vulnerability; its CVE record was published on January 1, 2021. The REST/JSON project 7.x-1.x for Drupal allows node access bypass, aka SA-CONTRIB-2016-033. NOTE: This project is not covered by Drupal's security advisory policy.
When was the CVE record for CVE-2016-20001 published?
The CVE record for CVE-2016-20001 was published on January 1, 2021. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of November 21, 2024; the record at its source may have been updated since.
Is CVE-2016-20001 actively exploited?
CVE-2016-20001 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1.2% probability of exploitation in the next 30 days (68th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2016-20001?
CVE-2016-20001 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2016-20001?
No fix for CVE-2016-20001 has been recorded since its CVE record was published in 2021, and EchelonGraph holds no vendor advisory for it. Isolate the affected system (restrict network access to it, for example with a firewall, or keep it off the internet) or retire the product.

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