How severe is CVE-2009-0253?

CVE-2009-0253 has a CVSS 2.0 base score of 6.8, rated medium severity.

Is CVE-2009-0253 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-0253?

CVE-2009-0253 affects Mozilla Firefox. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2009-0253?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2009-0253 published?

CVE-2009-0253 was published on 2009-01-22 and last updated on 2026-06-16.

CVE-2009-0253

CVE-2009-0253 is a medium-severity vulnerability in Mozilla Firefox with a CVSS 2.0 base score of 6.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 2.0 base score 6.8)
EPSS exploit prediction: 3% (83rd percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Mozilla Firefox
Published: 2009-01-22
Last modified: 2026-06-16

Description

Mozilla Firefox 3.0.5 allows remote attackers to trick a user into visiting an arbitrary URL via an onclick action that moves a crafted element to the current mouse position, related to a "Status Bar Obfuscation" and "Clickjacking" attack.

Frequently asked questions

What is CVE-2009-0253?: Mozilla Firefox 3.0.5 allows remote attackers to trick a user into visiting an arbitrary URL via an onclick action that moves a crafted element to the current mouse position, related to a "Status Bar Obfuscation" and "Clickjacking" attack.
How severe is CVE-2009-0253?: CVE-2009-0253 has a CVSS 2.0 base score of 6.8, rated medium severity.
Is CVE-2009-0253 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-0253?: CVE-2009-0253 affects Mozilla Firefox. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2009-0253?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2009-0253 published?: CVE-2009-0253 was published on 2009-01-22 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:mozilla:firefox:3.0.5:*:*:*:*:*:*:*

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