Security readout for executives and security teams
Plain-English summary
CVE-2021-25928 affects safe-obj versions 1.0.0 through 1.0.2. The issue is prototype pollution, where crafted object data can alter shared JavaScript object behavior. The CVE rates this critical and says impact can include denial of service and may lead to remote code execution. The provided sources do not show active exploitation or a named fixed version.
Executive priority
Prioritize this as urgent where safe-obj appears in production, especially public services. The severity is critical, but urgency depends on actual dependency presence and input exposure. No source in the bundle confirms active exploitation.
Technical view
safe-obj 1.0.0, 1.0.1, and 1.0.2 are listed as affected by CWE-1321 prototype pollution. The CVSS 3.1 vector is network-accessible, low complexity, unauthenticated, no user interaction, with high confidentiality, integrity, and availability impact. The bundle references vulnerable source code but does not provide exploit details, patch notes, or vendor mitigation text.
Likely exposure
Exposure is most likely in Node.js applications or transitive dependency trees that include safe-obj versions 1.0.0, 1.0.1, or 1.0.2, especially where untrusted object-shaped input reaches the library.
Exploitation context
The CVE describes denial of service and possible remote code execution impact. KEV is false, and the provided sources do not substantiate active exploitation in the wild. Treat internet-facing services using affected versions as higher priority because the CVSS vector is network and unauthenticated.
Researcher notes
Evidence is strong for affected package names, versions, CWE, and CVSS impact. Evidence is incomplete for exploit availability, active exploitation, and exact remediation. Avoid assuming all prototype pollution paths are remotely exploitable without confirming application data flow.
Mitigation direction
- Inventory direct and transitive use of safe-obj across JavaScript projects.
- Check vendor or package maintainer guidance for a fixed release or replacement path.
- Remove or replace affected safe-obj versions where business-critical services depend on them.
- Prioritize internet-facing applications that process untrusted JSON or object input.
- Add dependency scanning gates to block affected safe-obj versions.
Validation and detection
- Search package manifests and lockfiles for safe-obj versions 1.0.0 through 1.0.2.
- Use SCA tooling to detect direct and transitive safe-obj dependency paths.
- Map affected dependency paths to deployed services and public routes.
- Review whether untrusted input can reach safe-obj object handling.
- Confirm remediation by rescanning dependency locks after changes.
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.
CWE-1321: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-25928 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
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:H3.95.9Primary 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
Source materials
- CVE List V5 sourceCVE List V5
- https://www.whitesourcesoftware.com/vulnerability-database/CVE-2021-25928CVE reference · x_refsource_MISC
- https://github.com/mantacode/safe-obj/blob/6ab63529182b6cf11704ac84f10800290afd3f9f/lib/index.js#L122CVE 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.
Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.