Is CVE-2007-5459 being actively exploited?

CVE-2007-5459 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2007-5459?

CVE-2007-5459 has a CVSS 2.0 base score of 4.3 (MEDIUM).

CVE-2007-5459

MEDIUM · CVSS 4.3EPSS 1.0%EU EUVD

Cross-site scripting (XSS) vulnerability in the sidebar HTML page in the MouseoverDictionary before 0.6.2 extension for Mozilla Firefox allows remote attackers to inject arbitrary web script or HTML via unspecified vectors.

Key facts

CVSS score: 4.3 (v2.0)
Severity: MEDIUM
CVSS vector: AV:N/AC:M/Au:N/C:N/I:P/A:N
Weakness (CWE): CWE-79
EPSS score: 1.0% (63th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2007-5435)
Published: October 14, 2007
NVD last modified: June 16, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2007-5435 in the EU Vulnerability Database. Last updated in EUVD on August 7, 2024.

View on the EU Vulnerability Database

Affected products

itirou maruta / mouseoverdictionary
mozilla / firefox

References

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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