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CVE-2009-1903

16
FAUCET Score

CVE-2009-1903 describes a denial-of-service vulnerability in ModSecurity before version 2.5.8, affecting ModSecurity and Fedora distributions. An attacker can crash the Apache httpd server by requesting a PDF file with a non-GET HTTP method, bypassing the PDF XSS protection feature. This vulnerability has a CVSS score of 4.3 (medium severity), indicating a network-based attack with medium complexity and potential for partial availability impact. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
< 2.5.8CPE matchmatch criteria
cpe:2.3:a:trustwave:modsecurity:*:*:*:*:*:*:*:*
9CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:9:*:*:*:*:*:*:*
10CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:10:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

4.3MEDIUM

AV:N/AC:M/Au:N/C:N/I:N/A:P

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
3.03%
Probability of exploitation in next 30 days
EPSS Percentile
86.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0303 is in the 79th percentile among its peer group of 19,958 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

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

Remediation

Remediation records are not available for this CVE.

References

secunia.com / advisories/34256
Third Party Advisory
secunia.com / advisories/34311
Third Party Advisory
secunia.com / advisories/35687
Third Party Advisory
security.gentoo.org / glsa/glsa-200907-02.xml
Third Party Advisory
exchange.xforce.ibmcloud.com / vulnerabilities/49211
Third Party AdvisoryVDB Entry
sourceforge.net / project/shownotes.php
Broken Link
redhat.com / archives/fedora-package-announce/2009-March/msg00487.html
Third Party Advisory
redhat.com / archives/fedora-package-announce/2009-March/msg00529.html
Third Party Advisory
osvdb.org / 52552
Broken Link
securityfocus.com / bid/34096
Third Party AdvisoryVDB Entry
vupen.com / english/advisories/2009/0703
Third Party Advisory