ModSecurity before 2.6.6, when used with PHP, does not properly handle single quotes not at the beginning of a request parameter value in the Content-Disposition field of a request with a multipart/form-data Content-Type header, which allows remote attackers to bypass filtering rules and perform other attacks such as cross-site scripting (XSS) attacks
Published Jul 22, 2012
4.3
MEDIUMCVSS 2.0
EPSS 3.30%
Description
ModSecurity before 2.6.6, when used with PHP, does not properly handle single quotes not at the beginning of a request parameter value in the Content-Disposition field of a request with a multipart/form-data Content-Type header, which allows remote attackers to bypass filtering rules and perform other attacks such as cross-site scripting (XSS) attacks. NOTE: this vulnerability exists because of an incomplete fix for CVE-2009-5031.
Affected products
No data.
Configuration 1
- < 2.6.6
Configuration 2
Configuration 3
- 6.0
- 7.0
Configuration 4
- 11.1.1.6.0
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
AV:N/AC:M/Au:N/C:N/I:P/A:N
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (13 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 3.30% (0.03303) | 88.12th | v5 (v2026.06.15) |
| Jun 15, 2026 | 3.30% (0.03303) | 86.89th | v5 (v2026.06.15) |
| Jul 8, 2025 | 1.76% (0.01759) | 81.77th | v4 (v2025.03.14) |
| Mar 29, 2025 | 3.53% (0.03531) | 79.20th | v4 (v2025.03.14) |
| Mar 17, 2025 | 2.37% (0.02365) | 83.84th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.23% (0.00234) | 62.31th | v3 (v2023.03.01) |
| Jun 17, 2024 | 0.23% (0.00234) | 61.60th | v3 (v2023.03.01) |
| May 3, 2024 | 0.26% (0.00258) | 65.34th | v3 (v2023.03.01) |
| Nov 8, 2023 | 0.26% (0.00258) | 63.33th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.26% (0.00264) | 62.20th | v3 (v2023.03.01) |
| Mar 6, 2023 | 3.41% (0.03407) | 84.65th | v2 (v2022.01.01) |
| Apr 1, 2022 | 3.41% (0.03407) | 83.10th | v2 (v2022.01.01) |
| Feb 4, 2022 | 3.41% (0.03407) | 66.20th | v2 (v2022.01.01) |
No CWE recorded.
References (16)
- http://blog.ivanristic.com/2012/06/modsecurity-and-modsecurity-core-rule-set-multipart-bypasses.html x_refsource_MISCThird Party Advisory
- http://lists.opensuse.org/opensuse-updates/2013-08/msg00020.html vendor-advisoryx_refsource_SUSEMailing ListThird Party Advisory
- http://lists.opensuse.org/opensuse-updates/2013-08/msg00025.html vendor-advisoryx_refsource_SUSEMailing ListThird Party Advisory
- http://lists.opensuse.org/opensuse-updates/2013-08/msg00031.html vendor-advisoryx_refsource_SUSEMailing ListThird Party Advisory
- http://mod-security.svn.sourceforge.net/viewvc/mod-security/m2/branches/2.6.x/CHANGES x_refsource_CONFIRMBroken Link
- http://mod-security.svn.sourceforge.net/viewvc/mod-security/m2/trunk/CHANGES?r1=1920&r2=1919&pathrev=1920 x_refsource_CONFIRMBroken Link
- http://mod-security.svn.sourceforge.net/viewvc/mod-security/m2/trunk/apache2/msc_multipart.c?r1=1918&r2=1917&pathrev=1918 x_refsource_CONFIRMBroken Link
- http://secunia.com/advisories/49576 third-party-advisoryx_refsource_SECUNIAThird Party Advisory
- http://secunia.com/advisories/49782 third-party-advisoryx_refsource_SECUNIAThird Party Advisory
- http://www.debian.org/security/2012/dsa-2506 vendor-advisoryx_refsource_DEBIANThird Party Advisory
- http://www.mandriva.com/security/advisories?name=MDVSA-2012:118 vendor-advisoryx_refsource_MANDRIVAThird Party Advisory
- http://www.mandriva.com/security/advisories?name=MDVSA-2013:150 vendor-advisoryx_refsource_MANDRIVAThird Party Advisory
- http://www.openwall.com/lists/oss-security/2012/06/22/1 mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- http://www.openwall.com/lists/oss-security/2012/06/22/2 mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- http://www.oracle.com/technetwork/topics/security/cpuapr2013-1899555.html x_refsource_CONFIRMThird Party Advisory
- http://www.securityfocus.com/bid/54156 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
Change history (0)
No recorded changes yet.