CVE-2013-5042

Cross-site scripting (XSS) vulnerability in Microsoft ASP.NET SignalR 1.1.x before 1.1.4 and 2.0.x before 2.0.1, and Visual Studio Team Foundation Server 2013, allows remote attackers to inject arbitrary web script or HTML via crafted Forever Frame transport protocol data, aka "SignalR XSS Vulnerability."

Published: 2013-12-11 Last update: 2026-04-29 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2013-5042 is rated Moderate Risk (44.6/100): CVSS Medium severity, with high exploitation likelihood (EPSS 10.41%, 92th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. 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.

Exploit prediction scoring system (EPSS) score for CVE-2013-5042

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 2025-03-30 16.95% 10.41% -6.54%
2 2025-03-29 10.41% 16.95% +6.54%
3 2025-03-17 — 10.41% —

Full EPSS history (14 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2013-5042

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
4.3 2.0 MEDIUM
AV:N/AC:M/Au:N/C:N/I:P/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:N)
No availability impact.
 8.6 2.9 [email protected]

Weakness enumeration for CVE-2013-5042

Affected software / configurations for CVE-2013-5042

Vendor Product Version Raw CPE
microsoft asp.net_signalr 1.1.0 cpe:2.3:a:microsoft:asp.net_signalr:1.1.0:*:*:*:*:*:*:*
microsoft asp.net_signalr 1.1.1 cpe:2.3:a:microsoft:asp.net_signalr:1.1.1:*:*:*:*:*:*:*
microsoft asp.net_signalr 1.1.2 cpe:2.3:a:microsoft:asp.net_signalr:1.1.2:*:*:*:*:*:*:*
microsoft asp.net_signalr 1.1.3 cpe:2.3:a:microsoft:asp.net_signalr:1.1.3:*:*:*:*:*:*:*
microsoft asp.net_signalr 2.0.0 cpe:2.3:a:microsoft:asp.net_signalr:2.0.0:*:*:*:*:*:*:*
microsoft visual_studio_team_foundation_server 2013 cpe:2.3:a:microsoft:visual_studio_team_foundation_server:2013:*:*:*:*:*:*:*

References for CVE-2013-5042

cvelogic Threat Intelligence