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 Server and Lync Server XSS Elevation of Privilege Vulnerability."
Conclusion & alert: CVE-2015-2536 is rated Moderate Risk (50.2/100): CVSS Medium severity, with high exploitation likelihood (EPSS 8.86%, 95th percentile). Core evidence: EPSS ranks this CVE among the most likely to be exploited in the near term. Mandatory action: High exploitation likelihood—assess exposure and prioritize remediation.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-06-15 | 8.96% | 8.86% | -0.10% |
| 2 | 2025-12-16 | 10.44% | 8.96% | -1.48% |
| 3 | 2025-06-15 | — | 10.44% | — |
Full EPSS history (21 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 4.3 | 2.0 | MEDIUM |
|
8.6 | 2.9 | [email protected] |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| microsoft | lync_server | 2013 | cpe:2.3:a:microsoft:lync_server:2013:*:*:*:*:*:*:* |
| microsoft | skype_for_business_server | 2015 | cpe:2.3:a:microsoft:skype_for_business_server:2015:*:*:*:*:*:*:* |