CVE record · CVE-2023-41763

Skype for Business Elevation of Privilege Vulnerability

CVSS 5.3 MediumCriticalIn CISA KEVEPSS 0.90 · 99th percentile

Critical, because:

In CISA’s KEV catalogue since 10 Oct 2023: it is known to be exploited.

Published by the CVE Program (CNA: microsoft) at 10 Oct 2023, 17:07 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
Microsoft	Skype for Business Server 2015 CU13	affected 9319.0 to before 6.0.9319.869 custom
Microsoft	Skype for Business Server 2019 CU7	affected 2046.0 to before 7.0.246.530 custom

Identifiers: CVE-2023-41763
CNA: microsoft
Weakness (CWE): CWE-918
Tags: Microsoft Skype for Business Server 2015 CU13
Microsoft Skype for Business Server 2019 CU7
Server-side request forgery (SSRF)
Published: 10 Oct 2023
Updated: 21 Oct 2025

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
5.3	Medium	3.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:O/RC:C	CNA (microsoft)

CISA KEV Listed since 10 Oct 2023: known to be exploited.
EPSS 0.90, the 99th percentile, on 6 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 10 Oct 2023. New records show when each source confirmed them.

Sources

References from the CNA

msrc.microsoft.com/update-guide/vulnerability/CVE-2023-41763 vendor-advisory

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.