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Fencer Vulns
low 2.6

CVE-2003-1306 json

Microsoft URLScan 2.5, with the RemoveServerHeader option enabled, allows remote attackers to obtain sensitive information (server name and…

published 2003-12-31 22 y ago modified 2026-06-16 4 mo ago also EUVD-2003-1296

cvss
2.6
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.3%
EPSS 1.3% chance of exploitation in 30 days, percentile 70%
public exploits
0
none known

Summary

Microsoft URLScan 2.5, with the RemoveServerHeader option enabled, allows remote attackers to obtain sensitive information (server name and version) via an HTTP request that generates certain errors such as 400 "Bad Request," which leak the Server header in the response.

Exploit prediction

1.31% chance of exploitation in the next 30 days, higher than 70% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • osvdb.org http://www.osvdb.org/29370 referenced PoC, tagged "exploit" by a source, unverified
  • archives.neohapsis.com http://archives.neohapsis.com/archives/sf/www-mobile/2003-q3/0021.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 2.6 AV:N/AC:H/Au:N/C:P/I:N/A:N

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.