UpHeron
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Servers and applications

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.

Severity
Medium 6.8
Published
11 Oct 2002
Last changed
16 Jun 2026
Added to UpHeron
17 Oct 2026
Exploit chance
95% in the next 30 daysHigher than 99% of CVEs. EPSS by FIRST, 12 Nov 2026
Attack
Over the network · No login needed
Attacker can
Read some data · Change some data · Slow it down
CVSS vector
AV:N/AC:M/Au:N/C:P/I:P/A:P
Sources
NVD

Affected software

SoftwareAffected versions
Apache HTTP ServerServers and applications · cpe:a:apache:http_server
  • Version 2.0.42
  • Version 2.0.41
  • Version 2.0.40
  • Version 2.0.39
All 29 release lines
  • Version 1.3
  • Version 1.3.1
  • Version 1.3.3
  • Version 1.3.4
  • Version 1.3.6
  • Version 1.3.9
  • Version 1.3.11
  • Version 1.3.12
  • Version 1.3.14
  • Version 1.3.17
  • Version 1.3.18
  • Version 1.3.19
  • Version 1.3.20
  • Version 1.3.22
  • Version 1.3.23
  • Version 1.3.24
  • Version 1.3.25
  • Version 1.3.26
  • Version 2.0
  • Version 2.0.28
  • Version 2.0.32
  • Version 2.0.35
  • Version 2.0.36
  • Version 2.0.37
  • Version 2.0.38
  • Version 2.0.39
  • Version 2.0.40
  • Version 2.0.41
  • Version 2.0.42

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2002-0840
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2002-0840