Open Redirect in Microsoft Edge Chromium
CVE-2025-21401
Microsoft Edge (Chromium-based) Security Feature Bypass Vulnerability
Vulnerability class: Open Redirect
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.5 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.003 (22.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 23rd percentile — 22.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: +0.000
Affected products
- Microsoft Edge Chromium
- Microsoft Edge (Chromium-Based) — versions 1.0.0.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21401 (vendor-advisory, Patch, patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2025-21401?
- CVE-2025-21401 is a medium-severity vulnerability in Microsoft Edge Chromium, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 4.5/10. Published 2025-02-15.
- How severe is CVE-2025-21401?
- Medium severity. CVSS v3 base score is 4.5 out of 10.
- Is CVE-2025-21401 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.