CVE-2012-4528

Exp

The mod_security2 module before 2.7.0 for the Apache HTTP Server allows remote attackers to bypass rules, and deliver arbitrary POST data to a PHP application, via a multipart request in which an invalid part precedes the crafted data.

Published: 2012-12-28 Last update: 2026-04-29 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2012-4528 is rated High Exploit Risk (69.5/100): CVSS Medium severity, with high exploitation likelihood (EPSS 12.51%, 96th percentile). 2 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +1.05% over the last day, indicating growing attacker interest. Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

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

Public exploit references (Exploit-DB) for CVE-2012-4528

EDB-ID Source Kind Published Link
37949 exploit_db edb 2012-10-17 Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2012-4528

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 2026-06-15 11.46% 12.51% +1.05%
2 2025-12-14 13.97% 11.46% -2.52%
3 2025-11-30 — 13.97% —

Full EPSS history (17 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2012-4528

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:P/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:N)
No confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:N)
No availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2012-4528

OS Trackers for CVE-2012-4528

vendor priority summary link
debian not yet assigned CVE-2012-4528 not yet assigned priority: Debian including 1 source packages (modsecurity-apache), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2012-4528
suse medium — https://www.suse.com/security/cve/CVE-2012-4528/
ubuntu medium CVE-2012-4528 medium priority: Ubuntu including 1 source packages (modsecurity-apache), 16 status rows across 16 suites (hardy, lucid, natty, oneiric, precise, quantal, raring, saucy, trusty, upstream, utopic, vivid, wily, xenial, yakkety, zesty): not-affected 8, ignored 4, DNE 3, released 1. https://ubuntu.com/security/CVE-2012-4528

Affected software / configurations for CVE-2012-4528

Vendor Product Version Raw CPE
trustwave modsecurity < 2.7.0 cpe:2.3:a:trustwave:modsecurity:*:*:*:*:*:*:*:*
opensuse opensuse 11.4 cpe:2.3:o:opensuse:opensuse:11.4:*:*:*:*:*:*:*
opensuse opensuse 12.2 cpe:2.3:o:opensuse:opensuse:12.2:*:*:*:*:*:*:*
opensuse opensuse 12.3 cpe:2.3:o:opensuse:opensuse:12.3:*:*:*:*:*:*:*
fedoraproject fedora 18 cpe:2.3:o:fedoraproject:fedora:18:*:*:*:*:*:*:*

References for CVE-2012-4528

URL Tags
http://lists.fedoraproject.org/pipermail/package-announce/2012-November/093011.html Third Party Advisory
http://lists.opensuse.org/opensuse-updates/2013-08/msg00020.html Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-updates/2013-08/msg00025.html Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-updates/2013-08/msg00031.html Mailing List Third Party Advisory
http://mod-security.svn.sourceforge.net/viewvc/mod-security/m2/branches/2.7.x/CHANGES Broken Link
http://mod-security.svn.sourceforge.net/viewvc/mod-security/m2/trunk/apache2/msc_multipart.c?sortby=date&r1=2081&r2=2080&pathrev=2081 Broken Link
http://mod-security.svn.sourceforge.net/viewvc/mod-security?view=revision&sortby=date&revision=2081 Broken Link
http://seclists.org/fulldisclosure/2012/Oct/113 Exploit Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2012/10/18/14 Mailing List Third Party Advisory
https://www.sec-consult.com/fxdata/seccons/prod/temedia/advisories_txt/20121017-0_mod_security_ruleset_bypass.txt Third Party Advisory
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