CVE-2011-1127

CVE-2011-1127 is a critical-severity vulnerability in Simplemachines Smf with a CVSS 2.0 base score of 10.0. 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

SSI.php in Simple Machines Forum (SMF) before 1.1.13, and 2.x before 2.0 RC5, does not properly restrict guest access, which allows remote attackers to have an unspecified impact via unknown vectors.

Frequently asked questions

What is CVE-2011-1127?
SSI.php in Simple Machines Forum (SMF) before 1.1.13, and 2.x before 2.0 RC5, does not properly restrict guest access, which allows remote attackers to have an unspecified impact via unknown vectors.
How severe is CVE-2011-1127?
CVE-2011-1127 has a CVSS 2.0 base score of 10.0, rated critical severity.
Is CVE-2011-1127 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-1127?
CVE-2011-1127 primarily affects Simplemachines Smf. In total, 57 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2011-1127?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2011-1127 published?
CVE-2011-1127 was published on 2011-06-21 and last updated on 2026-06-16.

References

Affected products (57)

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