Acme Labs thttpd 2.20b 404 Error Message cross site scripting

CVSS Meta Temp Score
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CTI Interest Score
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5.7$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic has been found in Acme Labs thttpd 2.20b. The impacted element is an unknown function of the component 404 Error Message. This manipulation causes cross site scripting. The identification of this vulnerability is CVE-2002-0733. It is possible to initiate the attack remotely. Furthermore, there is an exploit available.

Detailsinfo

A vulnerability was found in Acme Labs thttpd 2.20b (Web Server). It has been declared as critical. Affected by this vulnerability is some unknown processing of the component 404 Error Message. 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 confidentiality, integrity, and availability. The summary by CVE is:

Cross-site scripting vulnerability in thttpd 2.20 and earlier allows remote attackers to execute arbitrary script via a URL to a nonexistent page, which causes thttpd to insert the script into a 404 error message.

The weakness was shared 04/18/2002 by Frog Man (Website). It is possible to read the advisory at ifrance.com. This vulnerability is known as CVE-2002-0733. The exploitation appears to be easy. 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 are unknown but a public exploit is available. The attack technique deployed by this issue is T1059.007 according to MITRE ATT&CK.

After before and not just, there has been an exploit disclosed. It is possible to download the exploit at exploit-db.com. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 1 days. During that time the estimated underground price was around $0-$5k. The commercial vulnerability scanner Qualys is able to test this issue with plugin 10605 (ACME Labs thttpd Cross-Site Scripting Vulnerability).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at X-Force (9029), Exploit-DB (21422), SecurityFocus (BID 4601†), OSVDB (5125†) and Vulnerability Center (SBV-4706†). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 5.7

VulDB Base Score: 6.3
VulDB Temp Score: 5.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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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: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

04/17/2001 🔍
04/17/2002 +365 days 🔍
04/18/2002 +0 days 🔍
04/25/2002 +7 days 🔍
08/12/2002 +109 days 🔍
04/09/2004 +605 days 🔍
07/11/2004 +93 days 🔍
07/22/2014 +3663 days 🔍
09/14/2025 +4072 days 🔍

Sourcesinfo

Advisory: ifrance.com
Researcher: Frog Man
Status: Not defined
Confirmation: 🔍

CVE: CVE-2002-0733 (🔍)
GCVE (CVE): GCVE-0-2002-0733
GCVE (VulDB): GCVE-100-18619
X-Force: 9029
SecurityFocus: 4601 - ACME Labs thttpd Cross-Site Scripting Vulnerability
OSVDB: 5125 - thttpd Error Page XSS
Vulnerability Center: 4706 - Acme Labs Thttpd Server Cross Site Scripting Attack via URL to Nonexistent Page, Medium

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

Entryinfo

Created: 07/22/2014 23:03
Updated: 09/14/2025 07:11
Changes: 07/22/2014 23:03 (60), 05/22/2019 21:15 (5), 12/04/2024 10:13 (23), 09/14/2025 07:11 (3)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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