CVE-2009-0843

The msLoadQuery function in mapserv in MapServer 4.x before 4.10.4 and 5.x before 5.2.2 allows remote attackers to determine the existence of arbitrary files via a full pathname in the queryfile parameter, which triggers different error messages depending on whether this pathname exists.

Published: 2009-03-31 Last update: 2026-04-23 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2009-0843 is rated Moderate Risk (57.7/100): CVSS High severity, with medium exploitation likelihood (EPSS 1.03%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2009-0843

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-03-30 0.88% 1.03% +0.16%
2 2025-03-29 1.03% 0.88% -0.16%
3 2025-03-19 — 1.03% —

Full EPSS history (6 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2009-0843

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.8 2.0 HIGH
AV:N/AC:L/Au:N/C:C/I:N/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:C)
Complete confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:N)
No availability impact.
 10.0 6.9 [email protected]

Weakness enumeration for CVE-2009-0843

OS Trackers for CVE-2009-0843

vendor priority summary link
debian not yet assigned CVE-2009-0843 not yet assigned priority: Debian including 1 source packages (mapserver), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2009-0843
redhat — — https://access.redhat.com/security/cve/CVE-2009-0843
ubuntu negligible CVE-2009-0843 negligible priority: Ubuntu including 1 source packages (mapserver), 7 status rows across 7 suites (dapper, gutsy, hardy, intrepid, jaunty, karmic, upstream): released 3, ignored 2, needs-triage 1, not-affected 1. https://ubuntu.com/security/CVE-2009-0843

Affected software / configurations for CVE-2009-0843

Vendor Product Version Raw CPE
osgeo mapserver 4.2.0 cpe:2.3:a:osgeo:mapserver:4.2.0:beta1:*:*:*:*:*:*
osgeo mapserver 4.4.0 cpe:2.3:a:osgeo:mapserver:4.4.0:*:*:*:*:*:*:*
osgeo mapserver 4.4.0 cpe:2.3:a:osgeo:mapserver:4.4.0:beta1:*:*:*:*:*:*
osgeo mapserver 4.4.0 cpe:2.3:a:osgeo:mapserver:4.4.0:beta2:*:*:*:*:*:*
osgeo mapserver 4.4.0 cpe:2.3:a:osgeo:mapserver:4.4.0:beta3:*:*:*:*:*:*
osgeo mapserver 4.6.0 cpe:2.3:a:osgeo:mapserver:4.6.0:*:*:*:*:*:*:*
osgeo mapserver 4.6.0 cpe:2.3:a:osgeo:mapserver:4.6.0:beta1:*:*:*:*:*:*
osgeo mapserver 4.6.0 cpe:2.3:a:osgeo:mapserver:4.6.0:beta2:*:*:*:*:*:*
osgeo mapserver 4.6.0 cpe:2.3:a:osgeo:mapserver:4.6.0:beta3:*:*:*:*:*:*
osgeo mapserver 4.6.0 cpe:2.3:a:osgeo:mapserver:4.6.0:rc1:*:*:*:*:*:*
osgeo mapserver 4.8.0 cpe:2.3:a:osgeo:mapserver:4.8.0:beta1:*:*:*:*:*:*
osgeo mapserver 4.8.0 cpe:2.3:a:osgeo:mapserver:4.8.0:beta2:*:*:*:*:*:*
osgeo mapserver 4.8.0 cpe:2.3:a:osgeo:mapserver:4.8.0:beta3:*:*:*:*:*:*
osgeo mapserver 4.8.0 cpe:2.3:a:osgeo:mapserver:4.8.0:rc1:*:*:*:*:*:*
osgeo mapserver 4.8.0 cpe:2.3:a:osgeo:mapserver:4.8.0:rc2:*:*:*:*:*:*
osgeo mapserver 4.10.0 cpe:2.3:a:osgeo:mapserver:4.10.0:*:*:*:*:*:*:*
osgeo mapserver 4.10.0 cpe:2.3:a:osgeo:mapserver:4.10.0:beta1:*:*:*:*:*:*
osgeo mapserver 4.10.0 cpe:2.3:a:osgeo:mapserver:4.10.0:beta2:*:*:*:*:*:*
osgeo mapserver 4.10.0 cpe:2.3:a:osgeo:mapserver:4.10.0:beta3:*:*:*:*:*:*
osgeo mapserver 4.10.0 cpe:2.3:a:osgeo:mapserver:4.10.0:rc1:*:*:*:*:*:*
osgeo mapserver 4.10.1 cpe:2.3:a:osgeo:mapserver:4.10.1:*:*:*:*:*:*:*
osgeo mapserver 4.10.2 cpe:2.3:a:osgeo:mapserver:4.10.2:*:*:*:*:*:*:*
osgeo mapserver 4.10.3 cpe:2.3:a:osgeo:mapserver:4.10.3:*:*:*:*:*:*:*
osgeo mapserver 5.0.0 cpe:2.3:a:osgeo:mapserver:5.0.0:*:*:*:*:*:*:*
osgeo mapserver 5.0.0 cpe:2.3:a:osgeo:mapserver:5.0.0:beta1:*:*:*:*:*:*
osgeo mapserver 5.0.0 cpe:2.3:a:osgeo:mapserver:5.0.0:beta2:*:*:*:*:*:*
osgeo mapserver 5.0.0 cpe:2.3:a:osgeo:mapserver:5.0.0:beta3:*:*:*:*:*:*
osgeo mapserver 5.0.0 cpe:2.3:a:osgeo:mapserver:5.0.0:beta4:*:*:*:*:*:*
osgeo mapserver 5.0.0 cpe:2.3:a:osgeo:mapserver:5.0.0:beta5:*:*:*:*:*:*
osgeo mapserver 5.0.0 cpe:2.3:a:osgeo:mapserver:5.0.0:beta6:*:*:*:*:*:*
osgeo mapserver 5.0.0 cpe:2.3:a:osgeo:mapserver:5.0.0:rc1:*:*:*:*:*:*
osgeo mapserver 5.0.0 cpe:2.3:a:osgeo:mapserver:5.0.0:rc2:*:*:*:*:*:*
osgeo mapserver 5.2.0 cpe:2.3:a:osgeo:mapserver:5.2.0:*:*:*:*:*:*:*
osgeo mapserver 5.2.0 cpe:2.3:a:osgeo:mapserver:5.2.0:beta1:*:*:*:*:*:*
osgeo mapserver 5.2.0 cpe:2.3:a:osgeo:mapserver:5.2.0:beta2:*:*:*:*:*:*
osgeo mapserver 5.2.0 cpe:2.3:a:osgeo:mapserver:5.2.0:beta3:*:*:*:*:*:*
osgeo mapserver 5.2.0 cpe:2.3:a:osgeo:mapserver:5.2.0:beta4:*:*:*:*:*:*
osgeo mapserver 5.2.0 cpe:2.3:a:osgeo:mapserver:5.2.0:rc1:*:*:*:*:*:*
osgeo mapserver 5.2.1 cpe:2.3:a:osgeo:mapserver:5.2.1:*:*:*:*:*:*:*
umn mapserver 4.0 cpe:2.3:a:umn:mapserver:4.0:*:*:*:*:*:*:*
umn mapserver 4.0 cpe:2.3:a:umn:mapserver:4.0:beta1:*:*:*:*:*:*
umn mapserver 4.0 cpe:2.3:a:umn:mapserver:4.0:beta2:*:*:*:*:*:*

References for CVE-2009-0843

cvelogic Threat Intelligence