CVE-2013-5042: n/a vulnerability

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...

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."

UnknownCVSS not scoredNot KEV-listedUpdatedAug 6, 2024, 16:59 UTC (UTC+00:00)

Security readout for executives and security teams

This is a cross-site scripting flaw in older Microsoft ASP.NET SignalR and Visual Studio Team Foundation Server 2013. A remote attacker could cause injected script or HTML to run through crafted Forever Frame transport data. Business impact depends on where SignalR or TFS is exposed and whether users can be targeted through the vulnerable path. Exposure is most likely in legacy .NET applications using ASP.NET SignalR 1.1.x or 2.0.x, and environments still running Team Foundation Server 2013. Internet-facing or user-accessible deployments carry higher practical risk. Treat this as a legacy exposure cleanup item with user-session risk. It is not KEV-listed in the bundle, but vulnerable public applications or TFS 2013 services should be remediated promptly because XSS can support credential theft, user impersonation, or workflow abuse. Mitigation focus: Upgrade SignalR 1.1.x deployments to 1.1.4 or later.; Upgrade SignalR 2.0.x deployments to 2.0.1 or later.; Apply Microsoft MS13-103 guidance for Team Foundation Server 2013..

Prepared: Jun 14, 2026, 15:13 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Dec 11, 2013, 00:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors

0Timeline events

0ADP providers

2Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

CVE List V5 sourceCVE List V5
MS13-103CVE reference · vendor-advisory, x_refsource_MS

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

n/an/an/aListed

Weakness

CWE details

No CWE listed

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