CVE-2005-0509: n/a vulnerability

CVE-2005-0509: Multiple cross-site scripting (XSS) vulnerabilities in the Mono 1.0.5 implementation of ASP.NET (.Net) allo...

Multiple cross-site scripting (XSS) vulnerabilities in the Mono 1.0.5 implementation of ASP.NET (.Net) allow remote attackers to inject arbitrary HTML or web script via Unicode representations for ASCII fullwidth characters that are converted to normal ASCII characters, including ">" and "<".

UnknownCVSS not scoredNot KEV-listedUpdatedAug 7, 2024, 21:13 UTC (UTC+00:00)

Security readout for executives and security teams

CVE-2005-0509 is an older cross-site scripting issue in Mono 1.0.5's ASP.NET implementation. Unicode fullwidth forms of characters like less-than and greater-than could be normalized into active HTML or script characters, allowing attacker-supplied input to execute in a user's browser. Exposure is most likely in legacy web applications running Mono 1.0.5 ASP.NET and accepting untrusted user input that is rendered into pages. The bundle's affected product metadata is incomplete, so confirm runtime versions directly. Treat as a legacy technology exposure issue. It is not flagged as actively exploited in the supplied evidence, but any remaining Mono 1.0.5 ASP.NET deployment should be prioritized for upgrade or retirement because browser-executed script can affect users and sessions. Mitigation focus: Inventory internet-facing and internal applications using Mono ASP.NET.; Confirm whether Mono 1.0.5 is still deployed anywhere.; Review vendor or project guidance for fixed versions or migration recommendations..

Prepared: Jun 30, 2026, 00:10 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: Feb 22, 2005, 05:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

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0CVSS vectors

0Timeline events

0ADP providers

1Source links

CVSS and timeline data

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Source materials

CVE List V5 sourceCVE List V5

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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