Is CVE-2009-2351 actively exploited?

No active exploitation of CVE-2009-2351 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2009-2351 be exploited remotely?

Yes. CVE-2009-2351 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2009-2351?

CVE-2009-2351 has a CVSS score of 4.3 (MEDIUM).

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MEDIUM

CVE-2009-2351

CWE-79Published: July 7, 2009· Updated: Jun 16, 2026

4.3

CVSS v3.1

Official Description

Opera 9.52 and earlier does not block javascript: URIs in Refresh headers in HTTP responses, which allows remote attackers to conduct cross-site scripting (XSS) attacks via vectors related to (1) injecting a Refresh header or (2) specifying the content of a Refresh header, a related issue to CVE-2009-1312. NOTE: it was later reported that 10.00 Beta 3 Build 1699 is also affected.

NVD Source

Technical Analysis

CVE-2009-2351 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.