HOMEVULNERABILITIESCVE-2009-5031
MEDIUM

CVE-2009-5031

CWE-79Published: July 22, 2012· Updated: Jun 16, 2026

4.3
CVSS v3.1

Official Description

ModSecurity before 2.5.11 treats request parameter values containing single quotes as files, which allows remote attackers to bypass filtering rules and perform other attacks such as cross-site scripting (XSS) attacks via a single quote in a request parameter in the Content-Disposition field of a request with a multipart/form-data Content-Type header.

NVD Source

Technical Analysis

CVE-2009-5031 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

From a weakness classification perspective (CWE-79): Cross-site scripting (XSS) vulnerabilities allow attackers to inject malicious scripts into web pages viewed by other users.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityM
Privileges Req.
User Interaction
Scope
Impact
ConfidentialityNone
IntegrityP
AvailabilityNone
AV:N/AC:M/Au:N/C:N/I:P/A:N

Affected Vendors & Products

openSUSE1 product(s)
opensuse
trustwave1 product(s)
modsecurity
Source: NVD CPE · 4 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttp://blog.ivanristic.com/2012/06/modsecurity-and-modsecurity-core-rule-set-multipart-bypasses.html
ADVISORYhttp://lists.opensuse.org/opensuse-updates/2013-08/msg00020.html
ADVISORYhttp://lists.opensuse.org/opensuse-updates/2013-08/msg00025.html
ADVISORYhttp://lists.opensuse.org/opensuse-updates/2013-08/msg00031.html
ADVISORYhttp://secunia.com/advisories/49576
ADVISORYhttp://www.openwall.com/lists/oss-security/2012/06/22/1
ADVISORYhttp://www.openwall.com/lists/oss-security/2012/06/22/2
ADVISORYhttp://www.securityfocus.com/bid/54156
ADVISORYhttp://www.suspekt.org/downloads/POC2009-ShockingNewsInPHPExploitation.pdf
ADVISORYhttp://blog.ivanristic.com/2012/06/modsecurity-and-modsecurity-core-rule-set-multipart-bypasses.html
ADVISORYhttp://lists.opensuse.org/opensuse-updates/2013-08/msg00020.html
ADVISORYhttp://lists.opensuse.org/opensuse-updates/2013-08/msg00025.html
ADVISORYhttp://lists.opensuse.org/opensuse-updates/2013-08/msg00031.html
ADVISORYhttp://secunia.com/advisories/49576
ADVISORYhttp://www.openwall.com/lists/oss-security/2012/06/22/1
ADVISORYhttp://www.openwall.com/lists/oss-security/2012/06/22/2
ADVISORYhttp://www.securityfocus.com/bid/54156
ADVISORYhttp://www.suspekt.org/downloads/POC2009-ShockingNewsInPHPExploitation.pdf

All References (22)

→
http://blog.ivanristic.com/2012/06/modsecurity-and-modsecurity-core-rule-set-multipart-bypasses.htmlThird Party Advisory
→
http://lists.opensuse.org/opensuse-updates/2013-08/msg00020.htmlMailing List · Third Party Advisory
→
http://lists.opensuse.org/opensuse-updates/2013-08/msg00025.htmlMailing List · Third Party Advisory
→
http://lists.opensuse.org/opensuse-updates/2013-08/msg00031.htmlMailing List · Third Party Advisory
→
http://mod-security.svn.sourceforge.net/viewvc/mod-security/m2/branches/2.6.x/CHANGESBroken Link
→
http://secunia.com/advisories/49576Third Party Advisory
→
http://www.openwall.com/lists/oss-security/2012/06/22/1Mailing List · Third Party Advisory
→
http://www.openwall.com/lists/oss-security/2012/06/22/2Mailing List · Third Party Advisory
→
http://www.securityfocus.com/bid/54156Third Party Advisory · VDB Entry
→
http://www.suspekt.org/downloads/POC2009-ShockingNewsInPHPExploitation.pdfThird Party Advisory
→
https://www.modsecurity.org/fisheye/browse/modsecurity/m2/branches/2.5.x/apache2/msc_multipart.c?r2=1419&r1=1366Broken Link
→
http://blog.ivanristic.com/2012/06/modsecurity-and-modsecurity-core-rule-set-multipart-bypasses.htmlThird Party Advisory
→
http://lists.opensuse.org/opensuse-updates/2013-08/msg00020.htmlMailing List · Third Party Advisory
→
http://lists.opensuse.org/opensuse-updates/2013-08/msg00025.htmlMailing List · Third Party Advisory
→
http://lists.opensuse.org/opensuse-updates/2013-08/msg00031.htmlMailing List · Third Party Advisory

Quick Facts

CVE IDCVE-2009-5031
CVSS Score4.3 / 10
SeverityMEDIUM
WeaknessCWE-79
CISA KEVNo
Affected2 vendor(s)
PublishedJul 22, 2012

Related CVEs (CWE-79)

CVE-2024-6886
10.0
CVE-2025-49410
10.0
CVE-2026-54433
10.0
CVE-2021-32671
10.0
CVE-2011-3046
10.0
CVE-2023-0776
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2009-5031 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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