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CVE Record

CVE-2020-7679: Prototype Pollution

In all versions of package casperjs, the mergeObjects utility function is susceptible to Prototype Pollution.

HighCVSS 7.3Not KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

CasperJS has a vulnerable object-merge utility that can let crafted object data alter shared JavaScript prototypes. That can cause unexpected behavior and may affect confidentiality, integrity, and availability. Urgency depends on whether CasperJS is present in production or build paths. The provided sources do not show active exploitation or name a fixed version.

Executive priority

Treat as high priority when CasperJS is in production or build systems handling untrusted data. If limited to isolated legacy tests, prioritize removal during normal dependency risk reduction, while documenting non-production scope.

Technical view

CVE-2020-7679 is prototype pollution in the casperjs mergeObjects utility. The bundled CVSS 3.1 score is 7.3 with network attack vector, low complexity, no privileges, and no user interaction. Sources identify casperjs as affected, but the bundle does not provide a precise patched version.

Likely exposure

Organizations are exposed if applications, test automation, build tooling, or WebJars/Bower packages include casperjs and process attacker-influenced object data through its merge utility.

Exploitation context

The CVE is not listed as KEV in the supplied bundle, and no cited source here confirms active exploitation. Exploitability is plausible from the CVSS vector, but operational risk depends on reachable use of mergeObjects with untrusted input.

Researcher notes

Evidence supports prototype pollution in casperjs mergeObjects and a high CVSS rating. The bundle lacks CWE mapping, exact affected version ranges beyond broad casperjs wording, active exploitation evidence, and a named patched release. Validate reachability before assigning incident-level urgency.

Mitigation direction

  • Inventory direct and transitive casperjs usage across JavaScript and WebJars/Bower dependencies.
  • Check Snyk and vendor guidance for a supported fixed version or advisory-specific remediation.
  • Remove or replace casperjs where no maintained safe version is available.
  • Avoid passing untrusted object data into casperjs merge utilities.
  • Prioritize production-reachable dependency paths before test-only tooling.

Validation and detection

  • Search dependency lockfiles and SBOMs for casperjs and related WebJars/Bower packages.
  • Confirm whether any production service imports or executes casperjs code.
  • Review uses of mergeObjects for attacker-controlled object inputs.
  • Run dependency scanning against the cited Snyk advisories.
  • Document whether exposure is production, build-time, test-only, or not present.
Prepared
Confidence
medium
Sources
5

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-2020-7679 mapping review

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Vulnerability profileCVE Program record
Severity
High
CVSS
7.3 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/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
4Source 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
7.3CVSS 3.1HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C3.93.4Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

7.3High
CVSS 3.1 vector shape for CVE-2020-7679Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/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/acasperjs0Listed
Weakness

CWE details

No CWE listed

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