Microsoft ISA Server Error Page 400.htm/500.htm cross site scripting

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
3.9$0-$5k0.00

Summaryinfo

A vulnerability has been found in Microsoft ISA Server and classified as critical. This issue affects some unknown processing of the file 400.htm/500.htm of the component Error Page. This manipulation causes cross site scripting. This vulnerability is registered as CVE-2003-0526. Remote exploitation of the attack is possible. Furthermore, an exploit is available. It is recommended to apply a patch to fix this issue.

Detailsinfo

A vulnerability has been found in Microsoft ISA Server (Firewall Software) (the affected version unknown) and classified as problematic. Affected by this vulnerability is an unknown part of the file 400.htm/500.htm of the component Error Page. The manipulation 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 integrity. The summary by CVE is:

Cross-site scripting (XSS) vulnerability in Microsoft Internet Security and Acceleration (ISA) Server 2000 allows remote attackers to inject arbitrary web script via a URL containing the script in the domain name portion, which is not properly cleansed in the default error pages (1) 500.htm for "500 Internal Server error" or (2) 404.htm for "404 Not Found."

The weakness was published 08/18/2003 by Brett Moore with Security-Assessment.com as MS03-028 as confirmed bulletin (Technet). It is possible to read the advisory at microsoft.com. This vulnerability is known as CVE-2003-0526 since 07/08/2003. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. Technical details and also a public exploit are known. The attack technique deployed by this issue is T1059.007 according to MITRE ATT&CK.

It is possible to download the exploit at exploit-db.com. It is declared as proof-of-concept. By approaching the search of inurl:400.htm/500.htm it is possible to find vulnerable targets with Google Hacking. The commercial vulnerability scanner Qualys is able to test this issue with plugin 62031 (Microsoft ISA Server Cross-Site Scripting Vulnerabilities (MS03-028)).

Applying the patch MS03-028 is able to eliminate this problem. The bugfix is ready for download at microsoft.com.

The vulnerability is also documented in the databases at X-Force (12627), Exploit-DB (22919), SecurityFocus (BID 8207†) and Vulnerability Center (SBV-4092†). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

Vendor

Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 3.9

VulDB Base Score: 4.3
VulDB Temp Score: 3.9
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Cross site scripting
CWE: CWE-80 / CWE-74 / CWE-707
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍
Google Hack: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: MS03-028

Timelineinfo

07/08/2003 🔍
07/16/2003 +8 days 🔍
07/16/2003 +0 days 🔍
08/18/2003 +33 days 🔍
08/18/2003 +0 days 🔍
04/05/2004 +231 days 🔍
08/14/2014 +3783 days 🔍
08/12/2025 +4016 days 🔍

Sourcesinfo

Vendor: microsoft.com

Advisory: MS03-028
Researcher: Brett Moore
Organization: Security-Assessment.com
Status: Confirmed

CVE: CVE-2003-0526 (🔍)
GCVE (CVE): GCVE-0-2003-0526
GCVE (VulDB): GCVE-100-20695

OVAL: 🔍

X-Force: 12627
SecurityFocus: 8207 - Microsoft ISA Server Cross-Site Scripting Vulnerabilities
Vulnerability Center: 4092 - [MS03-028] Cross-site Scripting in Microsoft Internet Security and Acceleration Server 2000, Medium

scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 08/14/2014 22:40
Updated: 08/12/2025 10:57
Changes: 08/14/2014 22:40 (62), 05/20/2019 18:18 (4), 03/22/2025 15:52 (25), 08/12/2025 10:57 (2)
Complete: 🔍
Cache ID: 216:C32:103

Be aware that VulDB is the high quality source for vulnerability data.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Do you want to use VulDB in your project?

Use the official API to access entries easily!