CVE-2009-0355

CVE-2009-0355 is a medium-severity vulnerability in Mozilla Firefox with a CVSS 2.0 base score of 5.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-264.

Key facts

Description

components/sessionstore/src/nsSessionStore.js in Mozilla Firefox before 3.0.6 does not block changes of INPUT elements to type="file" during tab restoration, which allows user-assisted remote attackers to read arbitrary files on a client machine via a crafted INPUT element.

Frequently asked questions

What is CVE-2009-0355?
components/sessionstore/src/nsSessionStore.js in Mozilla Firefox before 3.0.6 does not block changes of INPUT elements to type="file" during tab restoration, which allows user-assisted remote attackers to read arbitrary files on a client machine via a crafted INPUT element.
How severe is CVE-2009-0355?
CVE-2009-0355 has a CVSS 2.0 base score of 5.4, rated medium severity.
Is CVE-2009-0355 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (73rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-0355?
CVE-2009-0355 primarily affects Mozilla Firefox. In total, 92 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2009-0355?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2009-0355 published?
CVE-2009-0355 was published on 2009-02-04 and last updated on 2026-06-16.

References

Affected products (92)

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