How severe is CVE-2012-4740?

CVE-2012-4740 has a CVSS 2.0 base score of 4.3, rated medium severity.

Is CVE-2012-4740 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2012-4740?

CVE-2012-4740 affects Packetfence. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2012-4740?

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

When was CVE-2012-4740 published?

CVE-2012-4740 was published on 2012-08-31 and last updated on 2026-06-16.

CVE-2012-4740

CVE-2012-4740 is a medium-severity vulnerability in Packetfence 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: 1% (66th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Packetfence
Published: 2012-08-31
Last modified: 2026-06-16

Description

Cross-site scripting (XSS) vulnerability in the captive portal in PacketFence before 3.3.0 allows remote attackers to inject arbitrary web script or HTML via unspecified vectors.

Frequently asked questions

What is CVE-2012-4740?: Cross-site scripting (XSS) vulnerability in the captive portal in PacketFence before 3.3.0 allows remote attackers to inject arbitrary web script or HTML via unspecified vectors.
How severe is CVE-2012-4740?: CVE-2012-4740 has a CVSS 2.0 base score of 4.3, rated medium severity.
Is CVE-2012-4740 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2012-4740?: CVE-2012-4740 affects Packetfence. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2012-4740?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2012-4740 published?: CVE-2012-4740 was published on 2012-08-31 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:packetfence:packetfence:*:*:*:*:*:*:*:*

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