Skype for Business Server vulnerabilitiesAnd the versions its exploited flaws hit.

Product1 known exploited2 versions
The short answer

Skype for Business Server is made by Microsoft. We track 14 published vulnerabilities in it, across 2 versions. 1 of them is on the list of flaws known to be exploited, the newest added on 10 October 2023. If you run Skype for Business Server, check your version against the exploited flaws below and patch those first.

Check your version

The most recent Skype for Business Server flaw added to the known-exploited list is CVE-2023-41763, on 10 October 2023. We keep watching the known-exploited list.

Versions

Which versions of Skype for Business Server do the exploited flaws hit?

Each exploited flaw lists the versions it affects, as published by the vendor. Find your version, then patch.

  • CVE-2023-41763Exploited list, 10 Oct 2023

    Microsoft Skype for Business Privilege Escalation Vulnerability

    2015-cumulative_update_132019-cumulative_update_7
Known exploited

Which Skype for Business Server vulnerabilities are being exploited?

1 flaw is on the government list of vulnerabilities known to be exploited. These are the ones criminals are using now, so they go first, whatever their severity score says.

  1. 5.3
    CVE-2023-41763MediumKnown exploited
    Microsoft Skype for Business Privilege Escalation Vulnerability

    Microsoft Skype for Business contains an unspecified vulnerability that allows for privilege escalation.

    Chance of use91%Known exploited since10 Oct 2023
Exploit likelihood

Which Skype for Business Server flaws are most likely to be used?

Ranked by the latest exploit-likelihood forecast: the chance each flaw is used in an attack in the next 30 days. A high severity score on its own doesn't tell you that. Flaws shared by many other makers' products are left out.

50% or more10% to 49%Under 10%
  1. 91%
    CVE-2023-41763MediumKnown exploited

    Skype for Business Elevation of Privilege Vulnerability

    CVSS5.3Published10 Oct 2023
  2. 11%

    Cross-site scripting (XSS) vulnerability in the jQuery engine in Microsoft Lync Server 2013 and Skype for Business Server 2015 allows remote attackers to inject arbitrary web script or HTML via a crafted URL, aka...

    CVSS4.3Published9 Sep 2015
  3. 8.9%

    Cross-site scripting (XSS) vulnerability in Microsoft Lync Server 2013 and Skype for Business Server 2015 allows remote attackers to inject arbitrary web script or HTML via a crafted URL, aka "Skype for Business...

    CVSS4.3Published9 Sep 2015
  4. 3.6%

    Skype for Business Information Disclosure Vulnerability

    CVSS6.5Published15 Apr 2022
  5. 3.2%

    Skype for Business and Lync Denial of Service Vulnerability

    CVSS6.5Published25 Feb 2021
  6. 2.7%

    Skype for Business Remote Code Execution Vulnerability

    CVSS7.2Published10 Oct 2023
  7. 2.6%

    Skype for Business Remote Code Execution Vulnerability

    CVSS7.2Published10 Oct 2023
  8. 2.5%

    Skype for Business Remote Code Execution Vulnerability

    CVSS7.2Published10 Oct 2023
  9. 2.5%

    Skype for Business and Lync Spoofing Vulnerability

    CVSS5.3Published15 Apr 2022
  10. 2.2%

    Skype for Business and Lync Remote Code Execution Vulnerability

    CVSS7.2Published11 May 2021
Precursor Intelligence

Running Skype for Business Server? We'll keep checking.

Looking flaws up one at a time doesn't scale. Tell us what you run once, and we tell you which flaws matter to you, in what order, and keep watching for new ones.

  1. Tell us what you runPick your software from a list, or let us work it out from your website.
  2. We match it to every flawOver 400,000 published flaws, checked against your list.
  3. Ranked by real-world riskA 0 to 100 score, led by evidence criminals are using it.
  4. Told as soon as we knowAn alert by email, in the app or by webhook to your own tools.

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FAQ

Common questions, answered plainly.

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We track 14 published vulnerabilities listed under the name Skype for Business Server, across 2 versions. The most recent Skype for Business Server flaw added to the known-exploited list is CVE-2023-41763, on 10 October 2023.

1 is on the list of flaws known to be exploited. The most recently added is CVE-2023-41763.

Each flaw names its own versions, usually as ranges. The newest, CVE-2023-41763, affects 2015-cumulative_update_13, 2019-cumulative_update_7. The versions for every exploited flaw are listed on this page.

Create a Precursor Intelligence account and track Skype for Business Server. We match it against every published flaw, give each one a risk score from 0 to 100 and keep watching, so you hear about new ones as soon as we know, by email, in the app or by webhook.