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CVE-2009-0841

26
FAUCET Score

CVE-2009-0841 describes a directory traversal vulnerability in MapServer versions 4.x before 4.10.4 and 5.x before 5.2.2, specifically when running on Windows with Cygwin. This flaw allows remote attackers to create arbitrary files on the system by manipulating the 'id' parameter with ".." sequences. The vulnerability carries a critical CVSS score of 10.0, indicating a severe risk with network-based exploitation, low attack complexity, and complete compromise of confidentiality, integrity, and availability. Despite its high severity, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
4.2.0CPE matchmatch criteria
cpe:2.3:a:osgeo:mapserver:4.2.0:beta1:*:*:*:*:*:*
4.4.0CPE matchmatch criteria
cpe:2.3:a:osgeo:mapserver:4.4.0:*:*:*:*:*:*:*
4.4.0CPE matchmatch criteria
cpe:2.3:a:osgeo:mapserver:4.4.0:beta1:*:*:*:*:*:*
4.4.0CPE matchmatch criteria
cpe:2.3:a:osgeo:mapserver:4.4.0:beta2:*:*:*:*:*:*
4.4.0CPE matchmatch criteria
cpe:2.3:a:osgeo:mapserver:4.4.0:beta3:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

10.0HIGH

AV:N/AC:L/Au:N/C:C/I:C/A:C

Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
10.0
CvssVersion
2.0

Exploit Intelligence

EPSS Score
5.28%
Probability of exploitation in next 30 days
EPSS Percentile
91.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0528 is in the 85th percentile among its peer group of 51,485 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Advisories (1)

redhatCVE-2009-0841

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)

References

lists.osgeo.org / pipermail/mapserver-users/2009-March/060600.html
Patch
secunia.com / advisories/34520
secunia.com / advisories/34603
exchange.xforce.ibmcloud.com / vulnerabilities/49548
redhat.com / archives/fedora-package-announce/2009-April/msg00147.html
redhat.com / archives/fedora-package-announce/2009-April/msg00170.html
trac.osgeo.org / mapserver/ticket/2942
Vendor Advisory
debian.org / security/2009/dsa-1914
positronsecurity.com / advisories/2009-000.html
Exploit
securityfocus.com / archive/1/502271/100/0/threaded
securityfocus.com / bid/34306
securitytracker.com / id