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Fencer Vulns
medium 6.8

CVE-2002-0840 json

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 UseCanonicalNa…

published 2002-10-11 24 y ago modified 2026-06-16 4 mo ago also EUVD-2002-0832

cvss
6.8
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
95.1%
EPSS 95.1% chance of exploitation in 30 days, percentile 99.8%
public exploits
1
Exploit-DB

Summary

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.

Patch / fix

  • apache2 Debian 14, Debian 13, Debian 12 2.0.43-1

debian advisories DEBIAN-CVE-2002-0840

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2002-0840 updated

security flaw

  • Red Hat Linux 6.2 Red Hat Linux 7.0 Red Hat Linux 7.1 Red Hat Linux 7.2 Red Hat Linux 7.3 Red Hat Linux 8.0
    fixed: vendor fix RHSA-2002:222
  • Red Hat Linux Advanced Workstation 2.1
    fixed: vendor fix RHSA-2002:251
  • Red Hat Stronghold 3
    fixed: vendor fix RHSA-2002:243
  • Red Hat Stronghold 4
    fixed: vendor fix RHSA-2002:244
  • Red Hat Stronghold 4 for Red Hat Enterprise Linux
    fixed: vendor fix RHSA-2002:248

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Timeline

  1. First public exploit (EDB-21885)
  2. Published

Exploit prediction

95.09% chance of exploitation in the next 30 days, higher than 99.8% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-21885 Apache 1.3/2.0.x - Server Side Include Cross-Site Scripting remote, 2002-10-02

CVSS scores

assigned by version score vector
NVD 2.0 6.8 AV:N/AC:M/Au:N/C:P/I:P/A:P

Classification

Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.