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CVE Record

CVE-2020-7723: Prototype Pollution

All versions of package promisehelpers are vulnerable to Prototype Pollution via the insert function.

CriticalCVSS 9.8Not KEV-listedUpdated
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Glexia's TakeAutomated analysiscritical

Security readout for executives and security teams

Plain-English summary

CVE-2020-7723 affects the npm package promisehelpers. The reported flaw can let unsafe input modify JavaScript object prototypes, which may corrupt application behavior or security assumptions. The source bundle rates it critical, but exposure depends on whether the package is present and reachable through attacker-controlled data.

Executive priority

Treat this as high-priority dependency risk where promisehelpers exists in production, especially internet-facing services. Do not assume enterprise-wide exposure without confirming dependency presence and reachable input paths.

Technical view

The bundle describes prototype pollution in all versions of promisehelpers via the insert function. CVSS 3.1 is 9.8 with network attack vector, low complexity, no privileges, and no user interaction. No CPEs or CWEs are listed, and the supplied evidence does not identify a specific patched version.

Likely exposure

Organizations are likely exposed only where promisehelpers is included directly or transitively in a JavaScript application and its insert behavior can process untrusted input. The affected version data is sparse: the bundle says all versions, while the structured affected entry lists version "0".

Exploitation context

The bundle does not show CISA KEV listing and provides no cited evidence of active exploitation. The exploitability rating indicates proof-of-concept maturity, but that is not the same as confirmed exploitation in the wild.

Researcher notes

Key unknowns remain: no CWE is listed, no patched version is named in the provided bundle, and the affected version metadata is minimal. Validate against package lock data and the Snyk advisory before asserting remediation completeness.

Mitigation direction

  • Inventory direct and transitive uses of promisehelpers in JavaScript projects.
  • Check Snyk or package maintainer guidance for an available fixed or replacement version.
  • Remove or replace promisehelpers if no maintained fixed release is available.
  • Restrict untrusted object keys from reaching promisehelpers insert behavior.
  • Prioritize internet-facing services and build systems first.

Validation and detection

  • Check manifests, lockfiles, and SBOMs for promisehelpers.
  • Confirm whether promisehelpers is bundled into deployed application artifacts.
  • Review code paths where insert may receive user-controlled object data.
  • Use dependency scanning to map findings to CVE-2020-7723 or the Snyk advisory.
  • Document whether remediation is update, replacement, removal, or non-applicability.
Prepared
Confidence
medium
Sources
3

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

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CVE-2020-7723 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
Severity
Critical
CVSS
9.8 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

1CVSS vectors
0Timeline events
0ADP providers
2Source links

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
9.8CVSS 3.1CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C3.95.9Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

9.8Critical
CVSS 3.1 vector shape for CVE-2020-7723Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/apromisehelpers0Listed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.