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Zend Framework CVE-2012-6531

MEDIUM
Improper Input Validation (CWE-20)
2013-02-13 cve@mitre.org
XXE Zend Framework Zend
6.4
CVSS 2.0 · NVD
View

Vulnerability Assessment

Weakness
CWE
CWE-20
OWASP Top 10:2025
A05:2025 - Injection
ASVS 5.0
V2 - Validation and Business Logic Input validation, allowlisting
Impact

CVSS score of 6.4 (MEDIUM). Attack characteristics: network attack vector, low complexity. EPSS exploitation probability: 0.91%.
Exploit ScenarioDerived

This vulnerability can be exploited remotely over the network. Successful exploitation could compromise the medium-severity affected system.
This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
Patch available 0.9% exploitation probability (EPSS)

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AnalysisAI

(1) Zend_Dom, (2) Zend_Feed, and (3) Zend_Soap in Zend Framework 1.x before 1.11.13 and 1.12.x before 1.12.0 do not properly handle SimpleXMLElement classes, which allow remote attackers to read. Rated medium severity (CVSS 6.4), this vulnerability is remotely exploitable, low attack complexity.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

Affected Packages

composer zendframework/zendframework1 fix: 1.11.13, 1.12.0

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in composer

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Technical ContextAI · show details

This vulnerability is classified under CWE-20. (1) Zend_Dom, (2) Zend_Feed, and (3) Zend_Soap in Zend Framework 1.x before 1.11.13 and 1.12.x before 1.12.0 do not properly handle SimpleXMLElement classes, which allow remote attackers to read arbitrary files or create TCP connections via an external entity reference in a DOCTYPE element in an XML-RPC request, aka an XML external entity (XXE) injection attack, a different vulnerability than CVE-2012-3363. Affected products include: Zend Zend Framework. Version information: before 1.11.13.

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  • Exploit and PoC references, threat intelligence from 22 sources
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Severity by source

NVD PRIMARY 6.4 MEDIUM
AV:N/AC:L/Au:N/C:P/I:P/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
Low
Confidentiality
P
Integrity
P
Availability
None

DescriptionCVE.org

(1) Zend_Dom, (2) Zend_Feed, and (3) Zend_Soap in Zend Framework 1.x before 1.11.13 and 1.12.x before 1.12.0 do not properly handle SimpleXMLElement classes, which allow remote attackers to read arbitrary files or create TCP connections via an external entity reference in a DOCTYPE element in an XML-RPC request, aka an XML external entity (XXE) injection attack, a different vulnerability than CVE-2012-3363.

Threat Intelligence Overview

EPSS Score
0.9%
Top 24% exploitable
Data Quality
3 sources
Confidence: Low
NVD CVE.org EPSS

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity MEDIUM
CISA KEV No
Public POC No
EPSS 0.9%
Patch available Yes
Active threat No
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation· derived
None
System Exposure· derived
Open
Automatable· derived
No
Human Impact· derived
Medium

Priority Score

33
Low Medium High Critical
KEV: 0
EPSS: +1
CVSS: +32
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

XML External Entity Injection HIGH

XML External Entity (XXE) attacks exploit XML parsers that process Document Type Definitions (DTDs) without proper restrictions.

Affected Products (CPE)CVE.org

cpe:2.3:a:zend:zend_framework:1.0.4:*:*:*:*:*:*:*
cpe:2.3:a:zend:zend_framework:1.5.0:*:*:*:*:*:*:*
cpe:2.3:a:zend:zend_framework:1.5.1:*:*:*:*:*:*:*
cpe:2.3:a:zend:zend_framework:1.5.2:*:*:*:*:*:*:*
cpe:2.3:a:zend:zend_framework:1.5.3:*:*:*:*:*:*:*
cpe:2.3:a:zend:zend_framework:1.6.0:*:*:*:*:*:*:*
cpe:2.3:a:zend:zend_framework:1.6.1:*:*:*:*:*:*:*
cpe:2.3:a:zend:zend_framework:1.6.2:*:*:*:*:*:*:*
cpe:2.3:a:zend:zend_framework:1.7.0:*:*:*:*:*:*:*
cpe:2.3:a:zend:zend_framework:1.7.1:*:*:*:*:*:*:*
cpe:2.3:a:zend:zend_framework:1.7.2:*:*:*:*:*:*:*
cpe:2.3:a:zend:zend_framework:1.7.3:*:*:*:*:*:*:*
cpe:2.3:a:zend:zend_framework:1.7.4:*:*:*:*:*:*:*
cpe:2.3:a:zend:zend_framework:1.7.5:*:*:*:*:*:*:*
cpe:2.3:a:zend:zend_framework:1.7.6:*:*:*:*:*:*:*
cpe:2.3:a:zend:zend_framework:1.7.7:*:*:*:*:*:*:*
cpe:2.3:a:zend:zend_framework:1.7.8:*:*:*:*:*:*:*
cpe:2.3:a:zend:zend_framework:1.7.9:*:*:*:*:*:*:*
cpe:2.3:a:zend:zend_framework:1.8.0:*:*:*:*:*:*:*
cpe:2.3:a:zend:zend_framework:1.8.1:*:*:*:*:*:*:*
+ 39 more

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References

Advisories & patches
ADVISORY http://framework.zend.com/security/advisory/ZF2012-01 REF http://www.debian.org/security/2012/dsa-2505 REF http://www.openwall.com/lists/oss-security/2012/06/26/2 REF http://www.openwall.com/lists/oss-security/2012/06/26/4 REF http://www.openwall.com/lists/oss-security/2012/06/27/2 REF https://www.sec-consult.com/files/20120626-0_zend_framework_xxe_injection.txt

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