Security readout for executives and security teams
Plain-English summary
CVE-2020-7713 is a critical prototype pollution issue in the npm package arr-flatten-unflatten. If an application uses this package on attacker-controlled data, object behavior can be corrupted, potentially leading to data tampering, denial of service, or broader compromise depending on application logic.
Executive priority
Treat this as high-priority dependency remediation where the package exists in reachable production paths. Business urgency depends on whether untrusted data reaches the vulnerable library.
Technical view
The supplied CVE data says all versions of arr-flatten-unflatten are vulnerable to prototype pollution via the constructor. The CVSS 3.1 score is 9.8 with network attack vector, no privileges, and no user interaction. The sources do not describe a specific fixed version or operational workaround.
Likely exposure
Exposure is likely limited to JavaScript or Node.js applications that directly or transitively depend on arr-flatten-unflatten and process untrusted input through the vulnerable functionality.
Exploitation context
The supplied data marks KEV as false, so active exploitation is not evidenced here. The CVSS exploit maturity value indicates proof-of-concept status, but the bundle does not provide confirmed in-the-wild exploitation details.
Researcher notes
Evidence is narrow: the bundle identifies package, class, vector, severity, and Snyk reference, but not affected code paths, exploit payload details, or a named fixed version. Validate exposure through dependency graph and application data flow.
Mitigation direction
- Inventory direct and transitive use of arr-flatten-unflatten.
- Check Snyk, npm, and maintainer guidance for a fixed or safe replacement.
- Remove or replace the package if no fixed version is available.
- Restrict untrusted input from reaching vulnerable flatten/unflatten logic.
- Run dependency scanning in CI and block vulnerable package versions.
Validation and detection
- Search package lockfiles for arr-flatten-unflatten.
- Confirm whether production services include the dependency at runtime.
- Review call paths that pass user-controlled data into this library.
- Run SCA tooling against all JavaScript dependency manifests.
- Document any accepted risk if removal is not immediately possible.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
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-2020-7713 mapping review
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Open ATT&CK lookup- 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
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.
CVSS vector scores
1 official scoreWe 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.
CVSS: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 scoreVulnerability scoring details
Base CVSS 3.1 score
9.8CriticalVector: 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
Source materials
- CVE List V5 sourceCVE List V5
- https://snyk.io/vuln/SNYK-JS-ARRFLATTENUNFLATTEN-598396CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.