CVE-2023-41763 Microsoft Skype for Business Privilege Escalation
An attacker can exploit Server-Side Request Forgery in Skype for Business Server to escalate privileges and access sensitive data.
- Exploited in the wild
- Since 10 Oct 2023
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2023-41763?
CVE-2023-41763 is a medium-severity server-side request forgery vulnerability in Microsoft Skype for Business Server 2015 CU13, published on 10 Oct 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Skype for Business Elevation of Privilege Vulnerability
Weakness: CWE-918
Which versions are affected by CVE-2023-41763?
It affects 1 product.
Products include Microsoft Skype for Business Server.
How do I fix CVE-2023-41763?
No fix has been published for CVE-2023-41763 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 31 Oct 2023.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2023-41763 being exploited?
Yes. Attackers have exploited CVE-2023-41763 in the wild since at least 10 Oct 2023.
Public exploit code: 1 Nuclei template.
Other vulnerabilities in Microsoft Skype for Business Server 2015 CU13
- CVE-2026-66302 Skype for Business Remote Code Execution Vulnerability
- CVE-2026-69646 Skype for Business Spoofing Vulnerability
- CVE-2026-66304 Skype for Business Information Disclosure Vulnerability
- CVE-2026-66307 Skype for Business and Lync Denial of Service Vulnerability
- CVE-2023-36780 Skype for Business Remote Code Execution Vulnerability
Sources
Also known as GHSA-7997-4r78-h34m.