How severe is CVE-2012-3382?

CVE-2012-3382 has a CVSS 2.0 base score of 4.3, rated medium severity.

Is CVE-2012-3382 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (77th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2012-3382?

CVE-2012-3382 affects Mono. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2012-3382?

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

When was CVE-2012-3382 published?

CVE-2012-3382 was published on 2012-07-12 and last updated on 2026-06-16.

CVE-2012-3382

CVE-2012-3382 is a medium-severity vulnerability in Mono with a CVSS 2.0 base score of 4.3. 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-79.

Key facts

Severity: Medium (CVSS 2.0 base score 4.3)
EPSS exploit prediction: 2% (77th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Mono
Published: 2012-07-12
Last modified: 2026-06-16

Description

Cross-site scripting (XSS) vulnerability in the ProcessRequest function in mcs/class/System.Web/System.Web/HttpForbiddenHandler.cs in Mono 2.10.8 and earlier allows remote attackers to inject arbitrary web script or HTML via a file with a crafted name and a forbidden extension, which is not properly handled in an error message.

Frequently asked questions

What is CVE-2012-3382?: Cross-site scripting (XSS) vulnerability in the ProcessRequest function in mcs/class/System.Web/System.Web/HttpForbiddenHandler.cs in Mono 2.10.8 and earlier allows remote attackers to inject arbitrary web script or HTML via a file with a crafted name and a forbidden extension, which is not properly handled in an error message.
How severe is CVE-2012-3382?: CVE-2012-3382 has a CVSS 2.0 base score of 4.3, rated medium severity.
Is CVE-2012-3382 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (77th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2012-3382?: CVE-2012-3382 affects Mono. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2012-3382?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2012-3382 published?: CVE-2012-3382 was published on 2012-07-12 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:mono:mono:*:*:*:*:*:*:*:*

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