Security readout for executives and security teams
Plain-English summary
A vulnerable JavaScript package, deep-override versions 1.0.0 and 1.0.1, can let attacker-controlled data poison shared object behavior. The reported impact includes denial of service and possible remote code execution, so affected applications should be treated as high urgency until dependency exposure is ruled out.
Executive priority
Prioritize this as critical where deep-override is present in internet-facing or data-processing services. First prove whether the package exists in production dependencies, then remove or update affected versions using vendor guidance.
Technical view
CVE-2021-25941 is prototype pollution in deep-override 1.0.0 through 1.0.1, classified as CWE-1321. The CVSS 3.1 score is 9.8 with network attack vector, low complexity, no privileges, and no user interaction. Provided sources cite DoS and potential RCE impact.
Likely exposure
Exposure is limited to applications that include deep-override 1.0.0 or 1.0.1 directly or transitively, especially where untrusted input reaches object merge or override flows.
Exploitation context
The provided bundle does not show active exploitation, and KEV is false. Public references confirm the vulnerability class and affected versions, but do not provide exploitation-in-the-wild evidence here.
Researcher notes
Evidence is strong for affected package, versions, vulnerability type, and severity. The provided sources do not name a fixed release or prove active exploitation. Treat RCE as possible impact from the CVE description, not confirmed exploitation.
Mitigation direction
- Inventory direct and transitive use of deep-override.
- Remove or replace affected versions 1.0.0 and 1.0.1.
- Check maintainer guidance and the referenced fix commit before selecting a safe version.
- Avoid passing untrusted input into deep object override logic.
- Add dependency scanning for prototype pollution advisories.
Validation and detection
- Search package lockfiles for deep-override versions 1.0.0 or 1.0.1.
- Confirm whether runtime bundles include deep-override transitively.
- Review code paths where external JSON reaches override or merge functions.
- Verify remediation with dependency audit tooling after changes.
- Document any compensating controls if upgrade status is unclear.
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-2021-25941 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
- 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-2021-25941CVE reference · x_refsource_MISC
- https://github.com/ASaiAnudeep/deep-override/commit/2aced17651fb684959a6e04b1465a8329b3d5268CVE 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.