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Sharepoint Portal Server CVE-2013-1330

CRITICAL
Improper Input Validation (CWE-20)
2013-09-11 secure@microsoft.com
RCE Microsoft Sharepoint Server Sharepoint Services Sharepoint Portal Server Office Web Apps Sharepoint Foundation
10.0
CVSS 2.0 · NVD
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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 10.0 (CRITICAL). Attack characteristics: network attack vector, low complexity. EPSS exploitation probability: 67.14%.
Exploit ScenarioDerived

This vulnerability can be exploited remotely over the network. Successful exploitation could compromise the critical-severity affected system.
Emergency Immediate action required. Why: CRITICAL + EPSS > 30%, no patch available.
No patch listed yet 67.1% exploitation probability (EPSS)

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AnalysisAI

The default configuration of Microsoft SharePoint Portal Server 2003 SP3, SharePoint Server 2007 SP3 and 2010 SP1 and SP2, and Office Web Apps 2010 does not set the EnableViewStateMac attribute,. Rated critical severity (CVSS 10.0), this vulnerability is remotely exploitable, low attack complexity. Epss exploitation probability 67.1% and no vendor patch available.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

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Technical ContextAI · show details

This vulnerability is classified under CWE-20. The default configuration of Microsoft SharePoint Portal Server 2003 SP3, SharePoint Server 2007 SP3 and 2010 SP1 and SP2, and Office Web Apps 2010 does not set the EnableViewStateMac attribute, which allows remote attackers to execute arbitrary code by leveraging an unassigned workflow, aka "MAC Disabled Vulnerability." Affected products include: Microsoft Sharepoint Foundation, Microsoft Sharepoint Portal Server, Microsoft Sharepoint Server, Microsoft Sharepoint Services, Microsoft Office Web Apps.

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

NVD PRIMARY 10.0 CRITICAL
AV:N/AC:L/Au:N/C:C/I:C/A:C

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
Low
Confidentiality
C
Integrity
C
Availability
C

DescriptionCVE.org

The default configuration of Microsoft SharePoint Portal Server 2003 SP3, SharePoint Server 2007 SP3 and 2010 SP1 and SP2, and Office Web Apps 2010 does not set the EnableViewStateMac attribute, which allows remote attackers to execute arbitrary code by leveraging an unassigned workflow, aka "MAC Disabled Vulnerability."

Threat Intelligence Overview

Threat Score
4.0/10
Composite threat intelligence
EPSS Score
67.1%
Top 1% 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 CRITICAL
CISA KEV No
Public POC No
EPSS 67.1%
Patch available No
Active threat No
Deciding rule
CRITICAL + EPSS > 30%, no patch available
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

117
Low Medium High Critical
KEV: 0
EPSS: +67
CVSS: +50
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Remote Code Execution CRITICAL

Remote Code Execution represents the critical moment when an attacker successfully runs arbitrary code on a target system without physical access.

Affected Products (CPE)CVE.org

cpe:2.3:a:microsoft:sharepoint_foundation:2010:sp1:*:*:*:*:*:*
cpe:2.3:a:microsoft:sharepoint_foundation:2010:sp2:*:*:*:*:*:*
cpe:2.3:a:microsoft:sharepoint_portal_server:2003:sp3:*:*:*:*:*:*
cpe:2.3:a:microsoft:sharepoint_server:2007:sp3:*:*:*:*:*:*
cpe:2.3:a:microsoft:sharepoint_server:2010:sp1:*:*:*:*:*:*
cpe:2.3:a:microsoft:sharepoint_server:2010:sp2:*:*:*:*:*:*
cpe:2.3:a:microsoft:sharepoint_services:2.0:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:sharepoint_services:3.0:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:office_web_apps:2010:sp1:*:*:*:*:*:*

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Same weakness CWE-20 – Improper Input Validation

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References

Advisories & patches
REF http://www.us-cert.gov/ncas/alerts/TA13-253A REF https://docs.microsoft.com/en-us/security-updates/securitybulletins/2013/ms13-067 REF https://docs.microsoft.com/en-us/security-updates/securitybulletins/2013/ms13-105 REF https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A19040

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