Security readout for executives and security teams
Plain-English summary
CVE-2021-23402 affects the JavaScript package record-like-deep-assign. Its object-merging functionality can allow prototype pollution, meaning attacker-controlled properties may influence other objects in the application. This can undermine data integrity, confidentiality, or availability depending on how the package is used.
Executive priority
Treat as high priority where the package is reachable from internet-facing or user-input workflows. For unused or build-only dependency paths, prioritize after confirming reachability.
Technical view
All versions of record-like-deep-assign are described as vulnerable through the package’s main deep assignment behavior. The CVSS 3.1 score is 7.3, network exploitable, low complexity, no privileges, and no user interaction. The bundle does not name a fixed version.
Likely exposure
Exposure is likely limited to applications that include record-like-deep-assign directly or transitively and pass untrusted objects into its merge behavior.
Exploitation context
The CVE is not listed as KEV in the supplied bundle. The CVSS temporal vector includes proof-of-concept maturity, but no cited source here supports active exploitation.
Researcher notes
The source bundle provides severity, affected package, and references, but no CWE or fixed-version detail. Validate reachability before escalating. The referenced GitHub source lines identify the relevant implementation area, but this response avoids exploit mechanics.
Mitigation direction
- Inventory direct and transitive use of record-like-deep-assign.
- Check vendor, Snyk, and package guidance for fixed or replacement versions.
- Remove or replace the dependency if no maintained fix exists.
- Avoid passing untrusted objects into affected merge paths.
- Prioritize remediation where the package handles API, user, or webhook input.
Validation and detection
- Search lockfiles and SBOMs for record-like-deep-assign.
- Confirm whether production builds include the vulnerable package.
- Trace code paths that pass external input into deep assignment logic.
- Review dependency advisory data for available fixed versions.
- Add safe regression tests for object merge boundary behavior.
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
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CVE-2021-23402 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- 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:U/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:L/I:L/A:L/E:P/RL:U/RC:C3.93.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.3HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:U/RC:C
Source materials
- CVE List V5 sourceCVE List V5
- https://snyk.io/vuln/SNYK-JS-RECORDLIKEDEEPASSIGN-1311024CVE reference · x_refsource_MISC
- https://github.com/kripod/record-like-deep-assign/blob/v1.0.1/src/mod.ts%23L17-L35CVE 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.