Security readout for executives and security teams
Plain-English summary
This flaw could let a remote attacker with limited existing privileges spoof an Azure Active Directory B2C interaction, potentially exposing or altering sensitive data. Exploitation is considered difficult and does not require victim interaction. The supplied sources provide limited product-scope and remediation detail.
Executive priority
Handle as a scheduled security priority, accelerating remediation where affected identity services process sensitive customer or employee data. High potential confidentiality and integrity impact warrants attention, although exploitation requires elevated complexity and some existing privileges.
Technical view
CVE-2024-21381 is a network-reachable, CSRF-class spoofing vulnerability identified as CWE-352. Its CVSS 3.1 score is 6.8: high attack complexity, low privileges required, no user interaction, high confidentiality and integrity impact, and no availability impact.
Likely exposure
Potential exposure is limited to organizations using affected Microsoft Azure Active Directory B2C or Entra deployments. The bundle lists Entra version 1.0.0, but does not explain configurations, deployment models, or precise affected boundaries. Confirm applicability through Microsoft’s advisory.
Exploitation context
The supplied evidence does not demonstrate active exploitation, and the CVE is not listed as KEV. The CVSS temporal vector marks exploit maturity as proof-of-concept, but no campaign details, indicators, or exploitation mechanism are provided.
Researcher notes
The bundle supplies CWE and CVSS classifications but no technical mechanism, fixed version, or indicators. It lists Microsoft Entra 1.0.0 while the advisory title names Azure Active Directory B2C; confirm exact scope with Microsoft before testing or closure.
Mitigation direction
- Review Microsoft’s current advisory and apply its prescribed remediation.
- Inventory Azure Active Directory B2C and Entra deployments matching Microsoft’s affected scope.
- Reduce unnecessary low-privileged access until remediation is confirmed.
Validation and detection
- Compare deployed products and versions against Microsoft’s current advisory.
- Confirm vendor-prescribed remediation is applied across every affected tenant.
- Reassess affected identity flows after remediation using non-production data.
- Review identity monitoring for anomalous spoofing-related activity; no indicators were provided.
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-352: User-session and phishing behavior lookup
Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. 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 lookupCVE-2024-21381 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
- Medium
- CVSS
- 6.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N/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.
SSVC decision data
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:H/PR:L/UI:N/S:U/C:H/I:H/A:N/E:P/RL:O/RC:C1.65.2microsoftVulnerability scoring details
Base CVSS 3.1 score
6.8MediumVector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N/E:P/RL:O/RC:C
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- Microsoft Azure Active Directory B2C Spoofing VulnerabilityCVE reference, microsoft · vendor-advisory, patch
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.
Cross-Site Request Forgery (CSRF)
Cross-Site Request Forgery (CSRF) represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.