XSS in Microsoft Exchange Server
CVE-2020-17083
Microsoft Exchange Server Remote Code Execution Vulnerability
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.120 (96.0th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 96th percentile — 96.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.120 · newest: 0.120 · change: 0.000
Affected products
- Microsoft Exchange Server — versions 2013, 2016, 2019
- Microsoft Exchange Server 2013 Cumulative Update 23 — versions 15.00.0
- Microsoft Exchange Server 2016 Cumulative Update 17 — versions 15.01.0
- Microsoft Exchange Server 2016 Cumulative Update 18 — versions 15.01.0
- Microsoft Exchange Server 2019 Cumulative Update 6 — versions 15.02.0
- Microsoft Exchange Server 2019 Cumulative Update 7 — versions 15.02.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-17083 (Patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2020-17083?
- CVE-2020-17083 is a medium-severity vulnerability in Microsoft Exchange Server, classified under Cross-site Scripting. CVSS score: 5.5/10. Published 2020-11-11.
- How severe is CVE-2020-17083?
- Medium severity. CVSS v3 base score is 5.5 out of 10.
- Is CVE-2020-17083 known to be exploited?
- 13 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.