What is CVE-2025-21380?

CVE-2025-21380 is a high-severity vulnerability in Microsoft Azure Marketplace, classified under Improper Access Control. CVSS score: 8.8/10. Published 2025-01-09.

How severe is CVE-2025-21380?

High severity. CVSS v3 base score is 8.8 out of 10.

Is CVE-2025-21380 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Microsoft Azure Marketplace

CVE-2025-21380

Improper access control in Azure SaaS Resources allows an authorized attacker to disclose information over a network.

Published 2025-01-09 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.015 (73.3th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 73rd percentile — 73.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.015 · newest: 0.015 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-284 — Improper Access Control

Public proof-of-concept exploits

ARPSyndicate/cve-scores

References

msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21380 (vendor-advisory, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2025-21380?: CVE-2025-21380 is a high-severity vulnerability in Microsoft Azure Marketplace, classified under Improper Access Control. CVSS score: 8.8/10. Published 2025-01-09.
How severe is CVE-2025-21380?: High severity. CVSS v3 base score is 8.8 out of 10.
Is CVE-2025-21380 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.