Is CVE-2011-1221 actively exploited?

No active exploitation of CVE-2011-1221 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2011-1221 be exploited remotely?

Yes. CVE-2011-1221 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2011-1221?

CVE-2011-1221 has a CVSS score of 4.3 (MEDIUM).

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MEDIUM

CVE-2011-1221

CWE-79Published: October 4, 2011· Updated: Jun 16, 2026

4.3

CVSS v3.1

Official Description

Cross-zone scripting vulnerability in the RealPlayer ActiveX control in RealNetworks RealPlayer 11.0 through 11.1 and 14.0.0 through 14.0.5, RealPlayer SP 1.0 through 1.1.5, and RealPlayer Enterprise 2.0 through 2.1.5 allows remote attackers to inject arbitrary web script or HTML in the Local Zone via a local HTML document, a different vulnerability than CVE-2011-2947.

NVD Source

Technical Analysis

CVE-2011-1221 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

From a weakness classification perspective (CWE-79): Cross-site scripting (XSS) vulnerabilities allow attackers to inject malicious scripts into web pages viewed by other users.