CVE-2021-31856

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.

A SQL Injection vulnerability in the REST API in Layer5 Meshery 0.5.2 allows an attacker to execute arbitrary SQL commands via the /experimental/patternfiles endpoint (order parameter in GetMesheryPatterns in models/meshery_pattern_persister.go).

CVSS v3
9.8
EG Score
9.8CRITICALmedium confidence
EG Risk
79
EG Risk 79/100CISA 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

April 28, 2021

Last Modified

November 21, 2024

Advisory Details (2)

Auto-updated Oct 3, 2026
Patch available. Sources: github_pr.
generic

Meshery The Kubernetes and Cloud Native Manager - an extensible developer platform | Meshery

https://meshery.io
github_pr

Add "order by" query sanitization

Fix merged in layer5io/meshery PR #2745 on 2021-04-27 — awaiting tagged release

https://github.com/layer5io/meshery/pull/2745

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 3× in last 7d / 21× 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 113 total refreshes for this CVE.

  1. 2026-10-04 23:19 UTCEPSS rescore
  2. 2026-10-01 19:46 UTCEPSS rescore
  3. 2026-09-30 15:36 UTCEG score recompute
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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/2021/CVE-2021-31856.yaml
    First seen Jan 1, 2021

    Layer5 Meshery 0.5.2 - SQL Injection

    Open source ↗

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2021-31856?
CVE-2021-31856 is a critical vulnerability published on April 28, 2021. A SQL Injection vulnerability in the REST API in Layer5 Meshery 0.5.2 allows an attacker to execute arbitrary SQL commands via the /experimental/patternfiles endpoint (order parameter in GetMesheryPatterns in models/mesherypatternpersister.go).
When was CVE-2021-31856 disclosed?
CVE-2021-31856 was first published on April 28, 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-2021-31856 actively exploited?
CVE-2021-31856 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-2021-31856?
CVE-2021-31856 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2021-31856?
A fix for CVE-2021-31856 is available: update to the fixed version the vendor names in its advisory.

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