Back
CVE-2001-0004
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.
Published: Feb 12, 2001
Modified: Apr 16, 2026
CVSS Metrics
Affected Products (2)
| Vendor | Product | Version |
|---|---|---|
| microsoft | internet_information_server | 4.0 |
| microsoft | internet_information_services | 5.0 |
GitHub Security Advisory GHSA-mr3v-pmm4-26v3
IIS 5.0 and 4.0 allows remote attackers to read the source code for executable web server...
References (8)
- http://marc.info/?l=bugtraq&m=97897954625305&w=2
- http://www.securityfocus.com/bid/2313
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2001/ms01-004
- https://exchange.xforce.ibmcloud.com/vulnerabilities/5903
- http://marc.info/?l=bugtraq&m=97897954625305&w=2
- http://www.securityfocus.com/bid/2313
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2001/ms01-004
- https://exchange.xforce.ibmcloud.com/vulnerabilities/5903
Risk Scores
CVSS Score
5.0 / 10
EPSS Score
74.23%
Top 1% most likely to be exploited
Threat Score
52.3 / 100
Data Sources
NVD
EPSS
GitHub