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Fencer Vulns
critical 10.0

CVE-2009-0841 json

Directory traversal vulnerability in mapserv.c in mapserv in MapServer 4.x before 4.10.4 and 5.x before 5.2.2, when running on Windows with…

published 2009-03-31 17 y ago modified 2026-06-16 4 mo ago also EUVD-2009-0838

cvss
10.0
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
5.3%
EPSS 5.3% chance of exploitation in 30 days, percentile 92%
public exploits
0
none known

Summary

Directory traversal vulnerability in mapserv.c in mapserv in MapServer 4.x before 4.10.4 and 5.x before 5.2.2, when running on Windows with Cygwin, allows remote attackers to create arbitrary files via a .. (dot dot) in the id parameter.

Patch / fix

  • mapserver Debian 14, Debian 13, Debian 12 5.2.2-1

debian advisories DEBIAN-CVE-2009-0841

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-2009-0841 updated

mapserver: multiple security fixes in 5.2.2 and 4.10.4 (CVE-2009-0839, CVE-2009-0840, CVE-2009-0841, CVE-2009-0842, CVE-2009-0843, CVE-2009-1176, CVE-2009-1177)

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

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

Exploit prediction

5.28% chance of exploitation in the next 30 days, higher than 92% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • positronsecurity.com http://www.positronsecurity.com/advisories/2009-000.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 10.0 AV:N/AC:L/Au:N/C:C/I:C/A:C

Classification

Weakness
  • CWE-22 Improper Limitation of a Pathname to a Restricted Directory

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.