What is CVE-2025-59503?

CVE-2025-59503 is a critical-severity vulnerability in Microsoft Azure Compute Resource Provider, classified under Server-Side Request Forgery (SSRF). CVSS score: 10.0/10. Published 2025-10-23.

How severe is CVE-2025-59503?

Critical severity. CVSS v3 base score is 10.0 out of 10.

SSRF in Microsoft Azure Compute Resource Provider

CVE-2025-59503

Server-side request forgery (ssrf) in Azure Compute Gallery allows an unauthorized attacker to elevate privileges over a network.

Vulnerability class: SSRF (Server-Side Request Forgery)

Published 2025-10-23 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 10.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.008 (53.9th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 54th percentile — 53.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.008 · change: +0.001

Affected products

Weakness classification (CWE)

CWE-918 — Server-Side Request Forgery (SSRF)

References

msrc.microsoft.com/update-guide/vulnerability/CVE-2025-59503 (vendor-advisory, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2025-59503?: CVE-2025-59503 is a critical-severity vulnerability in Microsoft Azure Compute Resource Provider, classified under Server-Side Request Forgery (SSRF). CVSS score: 10.0/10. Published 2025-10-23.
How severe is CVE-2025-59503?: Critical severity. CVSS v3 base score is 10.0 out of 10.