CVE-2023-41763: Microsoft Skype for Business Privilege Escalation Vulnerability
CVE-2023-41763 · Severity: critical · CVSS 5.3 · Exploited in the wild · Published 2023-10-10
Microsoft Skype for Business Server contains a privilege escalation vulnerability caused by improper handling of server-side requests (SSRF). An unauthenticated attacker can send a specially crafted network request to gain access to sensitive information, such as IP addresses or port numbers, which could lead to further elevation of privilege.
Yes. CVE-2023-41763 is known to be exploited in the wild, first recorded on 10 October 2023. Treat it as urgent.
How severe is CVE-2023-41763?
Critical severity, with a CVSS score of 5.3, published 10 October 2023.
Which products and versions are affected?
Microsoft Skype for Business Server 2015 Cumulative Update 13; Microsoft Skype for Business Server 2019 Cumulative Update 7.
Is there a fix for CVE-2023-41763?
A patch was published on 2023-10-10. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2023-41763 attacked?
It is attacked over the network, in a network appliance.
Am I affected by CVE-2023-41763?
Check whether you run Microsoft Skype for Business. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Affected products
Microsoft Skype for Business Server 2015 Cumulative Update 13
Microsoft Skype for Business Server 2019 Cumulative Update 7
Timeline
2023-10-10: disclosed
2023-10-10: advisory
2023-10-10: patched
2023-10-10: kev added: Added to CISA Known Exploited Vulnerabilities (KEV) catalog.
2023-10-10: exploited: Reported as exploited in the wild at the time of publication.