CVE-2001-0004

high

Description

IIS 5.0 and 4.0 allows remote attackers to read the source code for executable web server programs by appending "%3F+.htr" to the requested URL, which causes the files to be parsed by the .HTR ISAPI extension, aka a variant of the "File Fragment Reading via .HTR" vulnerability.

References

https://exchange.xforce.ibmcloud.com/vulnerabilities/5903

https://docs.microsoft.com/en-us/security-updates/securitybulletins/2001/ms01-004

http://www.securityfocus.com/bid/2313

http://marc.info/?l=bugtraq&m=97897954625305&w=2

Details

Source: Mitre, NVD

Published: 2001-02-12

Updated: 2026-06-16

Risk Information

CVSS v2

Base Score: 5

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N

Severity: Medium

CVSS v3

Base Score: 7.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Severity: High

EPSS

EPSS: 0.28215