How severe is CVE-2011-4173?

CVE-2011-4173 has a CVSS 2.0 base score of 6.8, rated medium severity.

Is CVE-2011-4173 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-4173?

CVE-2011-4173 primarily affects Simplemachines Smf. In total, 13 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2011-4173?

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

When was CVE-2011-4173 published?

CVE-2011-4173 was published on 2011-10-24 and last updated on 2026-06-16.

CVE-2011-4173

CVE-2011-4173 is a medium-severity vulnerability in Simplemachines Smf 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. The underlying weakness is classified as CWE-352.

Key facts

Severity: Medium (CVSS 2.0 base score 6.8)
EPSS exploit prediction: 1% (44th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-352
Affected product: Simplemachines Smf
Published: 2011-10-24
Last modified: 2026-06-16

Description

Cross-site request forgery (CSRF) vulnerability in Simple Machines Forum (SMF) 2.x before 2.0.1 allows remote attackers to hijack the authentication of administrators or moderators via vectors involving image files, a different vulnerability than CVE-2011-3615. NOTE: some of these details are obtained from third party information.

Frequently asked questions

What is CVE-2011-4173?: Cross-site request forgery (CSRF) vulnerability in Simple Machines Forum (SMF) 2.x before 2.0.1 allows remote attackers to hijack the authentication of administrators or moderators via vectors involving image files, a different vulnerability than CVE-2011-3615. NOTE: some of these details are obtained from third party information.
How severe is CVE-2011-4173?: CVE-2011-4173 has a CVSS 2.0 base score of 6.8, rated medium severity.
Is CVE-2011-4173 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-4173?: CVE-2011-4173 primarily affects Simplemachines Smf. In total, 13 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2011-4173?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2011-4173 published?: CVE-2011-4173 was published on 2011-10-24 and last updated on 2026-06-16.

References

Affected products (13)

cpe:2.3:a:simplemachines:smf:2.0:*:*:*:*:*:*:*
cpe:2.3:a:simplemachines:smf:2.0:beta1:*:*:*:*:*:*
cpe:2.3:a:simplemachines:smf:2.0:beta2:*:*:*:*:*:*
cpe:2.3:a:simplemachines:smf:2.0:beta2.1:*:*:*:*:*:*
cpe:2.3:a:simplemachines:smf:2.0:beta3:*:*:*:*:*:*
cpe:2.3:a:simplemachines:smf:2.0:beta3.1:*:*:*:*:*:*
cpe:2.3:a:simplemachines:smf:2.0:beta4:*:*:*:*:*:*
cpe:2.3:a:simplemachines:smf:2.0:rc1:*:*:*:*:*:*
cpe:2.3:a:simplemachines:smf:2.0:rc1.2:*:*:*:*:*:*
cpe:2.3:a:simplemachines:smf:2.0:rc2:*:*:*:*:*:*
cpe:2.3:a:simplemachines:smf:2.0:rc3:*:*:*:*:*:*
cpe:2.3:a:simplemachines:smf:2.0:rc4:*:*:*:*:*:*
cpe:2.3:a:simplemachines:smf:2.0:rc5:*:*:*:*:*:*

More vulnerabilities in Simplemachines Smf

CVE-2011-1127 — Critical (CVSS 10.0): SSI.php in Simple Machines Forum (SMF) before 1.1.13, and 2.x before 2.0 RC5, does not properly restrict guest access,…
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