What is the CVSS score of CVE-2012-1858?

CVE-2012-1858 has a CVSS 2.0 base score of 4.3 (Medium). CVSS vector: AV:N/AC:M/Au:N/C:P/I:N/A:N. EPSS exploitation probability: 41.4%.

Is there a public PoC exploit available for CVE-2012-1858?

Yes, a public proof-of-concept exploit is available for CVE-2012-1858. Prioritise patching immediately. EPSS: 41.4%.

Lync CVE-2012-1858

MEDIUM

Information Exposure (CWE-200)

2012-06-12 secure@microsoft.com

Information Disclosure Microsoft XSS Lync Office Communicator Internet Explorer

4.3

CVSS 2.0 · NVD

Severity by source

NVD PRIMARY

4.3 MEDIUM

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

Attack Vector

Network

Attack Complexity

Confidentiality

Integrity

None

Availability

None

Lifecycle Timeline

CVE Published

Jun 12, 2012 - 22:55 cve.org

MEDIUM 4.3

DescriptionCVE.org

The toStaticHTML API (aka the SafeHTML component) in Microsoft Internet Explorer 8 and 9, Communicator 2007 R2, and Lync 2010 and 2010 Attendee does not properly handle event attributes and script, which makes it easier for remote attackers to conduct cross-site scripting (XSS) attacks via a crafted HTML document, aka "HTML Sanitization Vulnerability."

AnalysisAI

The toStaticHTML API (aka the SafeHTML component) in Microsoft Internet Explorer 8 and 9, Communicator 2007 R2, and Lync 2010 and 2010 Attendee does not properly handle event attributes and script,. Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable. Public exploit code available and EPSS exploitation probability 41.4%.

Technical ContextAI

This vulnerability is classified as Exposure of Sensitive Information (CWE-200), which allows attackers to access sensitive data that should not be disclosed. The toStaticHTML API (aka the SafeHTML component) in Microsoft Internet Explorer 8 and 9, Communicator 2007 R2, and Lync 2010 and 2010 Attendee does not properly handle event attributes and script, which makes it easier for remote attackers to conduct cross-site scripting (XSS) attacks via a crafted HTML document, aka "HTML Sanitization Vulnerability." Affected products include: Microsoft Lync, Microsoft Office Communicator, Microsoft Internet Explorer.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Minimize information in error messages, implement proper access controls, encrypt sensitive data at rest and in transit.