Is CVE-2002-0840 actively exploited?

CVE-2002-0840 has no public evidence of in-the-wild exploitation as of 2026-04-16.

What is the CVSS score for CVE-2002-0840?

CVE-2002-0840 has a CVSS score of 6.8 (UNKNOWN severity). Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P.

How do I patch CVE-2002-0840?

Patch guidance is available from apache security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2002-0840.

CVE-2002-0840 - remediation guidance & executive summary

Q: Which products are affected by CVE-2002-0840?

47 products: apache http server, apache http server, apache http server, apache http server, apache http server, and 42 more.

Description

Cross-site scripting (XSS) vulnerability in the default error page of Apache 2.0 before 2.0.43, and 1.3.x up to 1.3.26, when UseCanonicalName is "Off" and support for wildcard DNS is present, allows remote attackers to execute script as other web page visitors via the Host: header, a different vulnerability than CAN-2002-1157.

CVSS Metrics

Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P
Access Vector: network
Access Cmplx: medium
Auth: none
Confidentiality: partial
Integrity: partial
Availability: partial
Weaknesses: NVD-CWE-Other

Metadata

Primary Vendor: APACHE
Published: 10/11/2002
Last Modified: 4/16/2026
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

apache : http_serverapache : http_serverapache : http_serverapache : http_serverapache : http_serverapache : http_serverapache : http_serverapache : http_serverapache : http_serverapache : http_serverapache : http_serverapache : http_serverapache : http_serverapache : http_serverapache : http_serverapache : http_serverapache : http_serverapache : http_serverapache : http_serverapache : http_serverapache : http_serverapache : http_serverapache : http_serverapache : http_serverapache : http_serverapache : http_serverapache : http_serverapache : http_serverapache : http_serveroracle : application_serveroracle : application_serveroracle : application_serveroracle : application_serveroracle : application_serveroracle : application_serveroracle : database_serveroracle : database_serveroracle : database_serveroracle : oracle8ioracle : oracle8ioracle : oracle8ioracle : oracle8ioracle : oracle9ioracle : oracle9ioracle : oracle9ioracle : oracle9ioracle : oracle9i

Remediation Guidance

Executive Summary

View on NIST NVD