How severe is CVE-2012-5903?

CVE-2012-5903 has a CVSS 2.0 base score of 4.3, rated medium severity.

Is CVE-2012-5903 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-2012-5903?

CVE-2012-5903 affects Simple Machines Smf. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2012-5903?

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

When was CVE-2012-5903 published?

CVE-2012-5903 was published on 2012-11-17 and last updated on 2026-06-16.

CVE-2012-5903

CVE-2012-5903 is a medium-severity vulnerability in Simple Machines Smf 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% (73rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Simple Machines Smf
Published: 2012-11-17
Last modified: 2026-06-16

Description

Cross-site scripting (XSS) vulnerability in Simple Machines Forum (SMF) 2.0.2 allows remote attackers to inject arbitrary web script or HTML via the scheduled parameter to index.php.

Frequently asked questions

What is CVE-2012-5903?: Cross-site scripting (XSS) vulnerability in Simple Machines Forum (SMF) 2.0.2 allows remote attackers to inject arbitrary web script or HTML via the scheduled parameter to index.php.
How severe is CVE-2012-5903?: CVE-2012-5903 has a CVSS 2.0 base score of 4.3, rated medium severity.
Is CVE-2012-5903 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-2012-5903?: CVE-2012-5903 affects Simple Machines Smf. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2012-5903?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2012-5903 published?: CVE-2012-5903 was published on 2012-11-17 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:simple_machines:smf:2.0.2:*:*:*:*:*:*:*

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