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NVD / CVE Program· CNA redhat

CVE-2012-4528: 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…

MediumCVSS 5.0 · v2.0—Proof of concept Fix available

Noroxi assessment

Priority: Monitor (action score 24/100)

  • Public proof-of-concept code exists (Exploit-DB); there is no record of exploitation in the wild.
  • Probability of exploitation in the next 30 days: 12.3% (FIRST EPSS); higher than 96.2% of all records.
  • No special conditions are required; it is repeatable.
  • Fixed version: modsecurity-apache (Debian:12) 2.6.6-5; apache2-mod_security2 (openSUSE:Tumbleweed) 2.9.0-5.6.

Low priority for now. Upgrade to modsecurity-apache (Debian:12) 2.6.6-5; apache2-mod_security2 (openSUSE:Tumbleweed) 2.9.0-5.6 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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
Dec 28, 2012
Updated
Jun 16, 2026
EPSS
12.3% · 96th percentile
CWE
—

Report tools

JSON

Action score

24

Monitor

Low priority for now.

CVSS
20 / 40 · 5.0 / 10
CISA KEV
0 / 30 · Not listed
EPSS
4 / 30 · 12.3%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • Proof of concept exists, no weaponized module
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2012-4528

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
trustwavemodsecurity
opensuseopensuse
fedoraprojectfedora

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • fedoraproject fedora18
  • opensuse opensuse11.4
  • opensuse opensuse12.2
  • opensuse opensuse12.3
  • trustwave modsecuritybefore 2.7.0

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12modsecurity-apachebefore 2.6.6-52.6.6-5
openSUSE:Tumbleweedapache2-mod_security2before 2.9.0-5.62.9.0-5.6

Same product

trustwave: all records

Other highest-scoring records for the same primary product.

  • CVE-2025-27110Libmodsecurity3 has possible bypass of encoded HTML entities
    31Monitor
  • CVE-2013-1915ModSecurity before 2.7.3 allows remote attackers to read arbitrary files, send HTTP requests to intranet servers, or cause a denial of…
    31Monitor
  • CVE-2025-47947ModSecurity Has Possible DoS Vulnerability
    30Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2009-5031Jul 22, 2012 · ModSecurity before 2.5.11 treats request parameter values containing single quotes as files, which allows remote attackers to bypass…
    18Monitor
  • ← EarlierCVE-2012-2751Jul 22, 2012 · 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…
    18Monitor
  • Later →CVE-2013-5705Apr 15, 2014 · apache2/modsecurity.c in ModSecurity before 2.7.6 allows remote attackers to bypass rules by using chunked transfer coding with a…
    21Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
debian:modsecurity-apache2.6.6-5 · Debian:12Package registry (OSV)
opensuse:apache2-mod_security22.9.0-5.6 · openSUSE:TumbleweedPackage registry (OSV)

Exploit status

Proof of concept available

A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.

Evidence

  • Exploit-DB entry ×1

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
SourceKindDate
Exploit-DB entryremote2012-10-17

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. First PoC-72 d
  2. Published
  3. TodayNov 15, 2026+5070 d

Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · variant or chain candidate · public bounty program.

Technical details

Attack conditions

  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
P · data or configuration can be modified
Availability
none
Attack complexity
Low
Confidentiality impact
None
Integrity impact
P
Availability impact
None

Weakness class (CWE)

—

CVSS vector

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

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

References

Show all references (8 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records