What is CVE-2018-0924?

CVE-2018-0924 is a medium-severity vulnerability in Microsoft Exchange Server, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 6.5/10. Published 2018-03-14.

How severe is CVE-2018-0924?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Open Redirect in Microsoft Exchange Server

CVE-2018-0924

Microsoft Exchange Server 2010 Service Pack 3 Update Rollup 20, Microsoft Exchange Server 2013 Cumulative Update 18, Microsoft Exchange Server 2013 Cumulative Update 19, Microsoft Exchange Server 2013 Service Pack 1, Microsoft Exchange Server 2016 Cumulative Update 7, and Microsoft Exchange Server 2016 Cumulative Update 8 allow an information disclosure vulnerability due to how URL redirects are handled, aka "Microsoft Exchange Information Disclosure Vulnerability". This CVE is unique from CVE-2018-0941.

Vulnerability class: Open Redirect

Published 2018-03-14 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.080 (94.6th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 95th percentile — 94.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.080 · newest: 0.080 · change: 0.000

Affected products

Microsoft Exchange Server — versions 2010, 2013, 2016
Microsoft Corporation Exchange Server — versions Microsoft Exchange Server 2010 Service Pack 3 Update Rollup 20, Microsoft Exchange Server 2013 Cumulative Update 18, Microsoft Exchange Server 2013 Cumulative Update 19, Microsoft Exchange Server 2013 Service Pack 1, Microsoft Exchange Server 2016 Cumulative Update 7, and Microsoft Exchange Server 2016 Cumulative Update 8

Weakness classification (CWE)

CWE-601 — URL Redirection to Untrusted Site (Open Redirect)

References

www.securityfocus.com/bid/103320 (VDB Entry, Third Party Advisory, vdb-entry)
portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-0924 (Patch, Vendor Advisory)
www.securitytracker.com/id/1040521 (VDB Entry, Third Party Advisory, vdb-entry)

Frequently asked questions

What is CVE-2018-0924?: CVE-2018-0924 is a medium-severity vulnerability in Microsoft Exchange Server, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 6.5/10. Published 2018-03-14.
How severe is CVE-2018-0924?: Medium severity. CVSS v3 base score is 6.5 out of 10.