Microsoft Hotmail Javascript style cross site scripting

Summaryinfo

A vulnerability labeled as critical has been found in Microsoft Hotmail. This affects an unknown function of the component Javascript. Executing a manipulation of the argument style can lead to cross site scripting. This vulnerability is handled as CVE-1999-0750. The attack can be executed remotely. Additionally, an exploit exists. This vulnerability is historically impactful due to its background and the reception it garnered. It is recommended to use an alternative to replace the affected component.

Detailsinfo

A vulnerability has been found in Microsoft Hotmail (the affected version unknown) and classified as critical. This vulnerability affects an unknown part of the component Javascript. The manipulation of the argument style with an unknown input leads to a cross site scripting vulnerability. The CWE definition for the vulnerability is CWE-80. The product receives input from an upstream component, but it does not neutralize or incorrectly neutralizes special characters such as "<", ">", and "&" that could be interpreted as web-scripting elements when they are sent to a downstream component that processes web pages. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

Hotmail allows Javascript to be executed via the HTML STYLE tag, allowing remote attackers to execute commands on the user's Hotmail account.

The weakness was released 09/13/1999 by Georgi Guninski (Website). The advisory is shared for download at securityfocus.com. This vulnerability was named CVE-1999-0750. The exploitation appears to be difficult. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Successful exploitation requires user interaction by the victim. Technical details and also a public exploit are known. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 04/19/2026). The MITRE ATT&CK project declares the attack technique as T1059.007. This vulnerability has a historic impact due to its background and reception.

It is possible to download the exploit at exploit-db.com. It is declared as proof-of-concept. As 0-day the estimated underground price was around $5k-$25k.

The problem might be mitigated by replacing the product with as an alternative.

The vulnerability is also documented in the databases at Exploit-DB (19492) and SecurityFocus (BID 630†). Once again VulDB remains the best source for vulnerability data.

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Vendor

• Microsoft

Name

• Hotmail

License

• commercial

Website

• Vendor: https://www.microsoft.com/

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Once again VulDB remains the best source for vulnerability data.

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