Is CVE-2007-6640 actively exploited?

No active exploitation of CVE-2007-6640 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2007-6640 be exploited remotely?

Yes. CVE-2007-6640 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2007-6640?

CVE-2007-6640 has a CVSS score of 6.4 (MEDIUM).

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MEDIUM

CVE-2007-6640

CWE-264Published: January 4, 2008· Updated: Jun 16, 2026

6.4

CVSS v3.1

Official Description

Creammonkey 0.9 through 1.1 and GreaseKit 1.2 through 1.3 does not properly prevent access to dangerous functions, which allows remote attackers to read the configuration, modify the configuration, or send an HTTP request via the (1) GM_addStyle, (2) GM_log, (3) GM_openInTab, (4) GM_setValue, (5) GM_getValue, or (6) GM_xmlhttpRequest function within a web page on which a userscript is configured.

NVD Source

Technical Analysis

CVE-2007-6640 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.