Back

CVE-2002-0840

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.

Published: Oct 11, 2002 Modified: Jun 16, 2026

CVSS Metrics

Affected Products (47)

Vendor Product Version
apache http_server 1.3
apache http_server 1.3.1
apache http_server 1.3.3
apache http_server 1.3.4
apache http_server 1.3.6
apache http_server 1.3.9
apache http_server 1.3.11
apache http_server 1.3.12
apache http_server 1.3.14
apache http_server 1.3.17
apache http_server 1.3.18
apache http_server 1.3.19
apache http_server 1.3.20
apache http_server 1.3.22
apache http_server 1.3.23
apache http_server 1.3.24
apache http_server 1.3.25
apache http_server 1.3.26
apache http_server 2.0
apache http_server 2.0.28

…and 27 more

GitHub Security Advisory GHSA-rg25-cp4q-r4c8

Cross-site scripting (XSS) vulnerability in the default error page of Apache 2.0 before 2.0.43,...

Risk Scores

CVSS Score 6.8 / 10
EPSS Score 95.09%

Top 0% most likely to be exploited

Threat Score 65.7 / 100

Data Sources

NVD EPSS GitHub