SOC status:Duty analyst on shift

UK Cyber Defence
VulnerabilityModified

CVE-2004-1133

Multiple cross-site scripting (XSS) vulnerabilities in Microsoft W3Who ISAPI (w3who.dll) allow remote attackers to inject arbitrary HTML and web script via (1) HTTP headers such as "Connection" or (2) invalid parameters whose values are echoed in the…

MEDIUM 6.8EPSS 9.81%

Does this matter?

Lower severity and a low EPSS score (9.81%). Track it; it rarely justifies an emergency change on its own.

Description

Multiple cross-site scripting (XSS) vulnerabilities in Microsoft W3Who ISAPI (w3who.dll) allow remote attackers to inject arbitrary HTML and web script via (1) HTTP headers such as "Connection" or (2) invalid parameters whose values are echoed in the resulting error message.

CVSS 2.0
6.8 MEDIUMAV:N/AC:M/Au:N/C:P/I:P/A:P
EPSS
9.81% probability · 96th percentile
Public exploits
None in Exploit-DB
CISA KEV
Not listed
Affected
microsoft/w3who.dll
Source
cve@mitre.org
EPSS trend
0%5%10%26 October 2026: 9.81%26 October 202626 October 2026

EPSS 9.8% since 26 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.

Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.