CVE-2002-0840

NONECVSS 0.09.0▲
EchelonGraph scoreLOW confidence

Score elevated to 9.0 because EPSS predicts 90% probability of exploitation within the next 30 days (top 0.4% of all CVEs). Confidence: see factors.

Triggered by: EPSS exploit prediction ≥85%
Sources: epss
Weaponized
0.0
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • 1 internet-exposed host is running an affected version right now
  • High exploitation likelihood — EPSS 94%
CISA-KEV: Not listedEPSS: 94%CVSS: —Exploit: NoneExposed: 1

A fix is available — apply it.

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.

Live · internet exposure

1 internet-exposed host is running an affected version of CVE-2002-0840 right now.

across 1 countries (United States)top: http_server
See the live KEV-Exposure radar →Found passively from public internet-scan data — aggregate, host-redacted.

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CVSS v3
—
EG Score
9.0(low)
EPSS
99.8%
KEV
Not listed

Published

October 11, 2002

Last Modified

June 16, 2026

References (74)

Patch Availability(6)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatpatch2003-04-22redhat
redhatpatch2003-01-09redhat
redhatpatch2002-12-12redhat
redhatpatch2002-11-08redhat
redhatpatch2002-11-08redhat
redhatpatch2002-11-07redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

All Vendor Advisories

(6)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 1× in last 7d / 11× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-09 13:15 UTCOSV refresh
  2. 2026-07-02 14:00 UTCEPSS rescore
  3. 2026-06-23 21:29 UTCEPSS rescore
  4. 2026-06-21 01:42 UTCOSV refresh
  5. 2026-06-18 17:49 UTCEPSS rescore
  6. 2026-06-18 17:49 UTCEPSS rescore
  7. 2026-06-17 17:49 UTCEPSS rescore
  8. 2026-06-17 17:49 UTCEPSS rescore
  9. 2026-06-15 17:43 UTCEPSS rescore
  10. 2026-06-14 23:13 UTCEPSS rescore
  11. 2026-06-14 23:13 UTCEPSS rescore
  12. 2026-06-13 22:56 UTCEPSS rescore
  13. 2026-06-12 23:08 UTCEPSS rescore
  14. 2026-06-10 22:13 UTCEPSS rescore
  15. 2026-06-10 13:17 UTCEPSS rescore
  16. 2026-06-08 14:13 UTCEPSS rescore
  17. 2026-06-05 22:43 UTCEPSS rescore
  18. 2026-06-05 22:43 UTCEPSS rescore
  19. 2026-06-05 06:07 UTCEPSS rescore
  20. 2026-06-02 20:10 UTCEPSS rescore
  21. 2026-05-31 18:47 UTCEG score recompute
  22. 2026-05-31 18:47 UTCVendor advisory
  23. 2026-05-31 18:47 UTCGHSA enrichment
  24. 2026-05-31 00:13 UTCEPSS rescore
  25. 2026-05-31 00:13 UTCEPSS rescore
Show 7 more
  1. 2026-05-28 13:42 UTCEPSS rescore
  2. 2026-05-28 13:42 UTCEPSS rescore
  3. 2026-05-28 13:42 UTCEPSS rescore
  4. 2026-05-27 13:37 UTCEPSS rescore
  5. 2026-05-23 00:07 UTCOSV refresh
  6. 2026-05-18 21:29 UTCEPSS rescore
  7. 2026-05-18 21:29 UTCEPSS rescore

Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Exploit-DBEDB-21885✓ verified
    First seen Oct 2, 2002

    Apache 1.3/2.0.x - Server Side Include Cross-Site Scripting

    Open source ↗

Related CVEs(same vendor)

Frequently asked(4)

What is CVE-2002-0840?
CVE-2002-0840 is a none vulnerability published on October 11, 2002. 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…
When was CVE-2002-0840 disclosed?
CVE-2002-0840 was first published in the National Vulnerability Database on October 11, 2002, with the most recent update on June 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2002-0840 actively exploited?
CVE-2002-0840 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 99.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
How do I remediate CVE-2002-0840?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2002-0840, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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