What is CVE-2025-44594?

CVE-2025-44594 is a critical-severity vulnerability in Halo, classified under Server-Side Request Forgery (SSRF). CVSS score: 9.1/10. Published 2025-09-09.

How severe is CVE-2025-44594?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Is CVE-2025-44594 known to be exploited?

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

SSRF in Halo

CVE-2025-44594

halo v2.20.17 and before is vulnerable to server-side request forgery (SSRF) in /apis/uc.api.storage.halo.run/v1alpha1/attachments/-/upload-from-url.

Vulnerability class: SSRF (Server-Side Request Forgery)

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

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.

EPSS exploit prediction

EPSS: 0.004 (28.8th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 29th percentile — 28.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Halo

Weakness classification (CWE)

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

Public proof-of-concept exploits

fkie-cad/nvd-json-data-feeds

References

meadow-horn-b94.notion.site/halo-ssrf-14c42bd5b11880c09936df07f58f5bed (Broken Link)

Frequently asked questions

What is CVE-2025-44594?: CVE-2025-44594 is a critical-severity vulnerability in Halo, classified under Server-Side Request Forgery (SSRF). CVSS score: 9.1/10. Published 2025-09-09.
How severe is CVE-2025-44594?: Critical severity. CVSS v3 base score is 9.1 out of 10.
Is CVE-2025-44594 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.