CVE-2011-5131

CVE-2011-5131 is a medium-severity vulnerability in Mybb 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% (60th percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-352
• Affected product: Mybb
• Published: 2012-08-30
• Last modified: 2026-06-16

Description

Cross-site request forgery (CSRF) vulnerability in global.php in MyBB before 1.6.5 allows remote attackers to hijack the authentication of a user for requests that change the user's language via the language parameter.

Frequently asked questions

What is CVE-2011-5131?

Cross-site request forgery (CSRF) vulnerability in global.php in MyBB before 1.6.5 allows remote attackers to hijack the authentication of a user for requests that change the user's language via the language parameter.

How severe is CVE-2011-5131?

CVE-2011-5131 has a CVSS 2.0 base score of 6.8, rated medium severity.

Is CVE-2011-5131 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-5131?

CVE-2011-5131 primarily affects Mybb. In total, 50 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2011-5131?

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

When was CVE-2011-5131 published?

CVE-2011-5131 was published on 2012-08-30 and last updated on 2026-06-16.

References

• http://blog.mybb.com/2011/11/25/mybb-1-6-5-released-feature-update-security-maintenance-release/
• http://dev.mybb.com/issues/1729
• http://secunia.com/advisories/46951
• http://www.osvdb.org/77327
• http://www.securityfocus.com/bid/50816
• https://exchange.xforce.ibmcloud.com/vulnerabilities/71462

Affected products (50)

• cpe:2.3:a:mybb:mybb:*:*:*:*:*:*:*:*
• cpe:2.3:a:mybb:mybb:1.1.0:*:*:*:*:*:*:*
• cpe:2.3:a:mybb:mybb:1.1.1:*:*:*:*:*:*:*
• cpe:2.3:a:mybb:mybb:1.1.2:*:*:*:*:*:*:*
• cpe:2.3:a:mybb:mybb:1.1.3:*:*:*:*:*:*:*
• cpe:2.3:a:mybb:mybb:1.1.4:*:*:*:*:*:*:*
• cpe:2.3:a:mybb:mybb:1.1.5:*:*:*:*:*:*:*
• cpe:2.3:a:mybb:mybb:1.1.6:*:*:*:*:*:*:*
• cpe:2.3:a:mybb:mybb:1.1.7:*:*:*:*:*:*:*
• cpe:2.3:a:mybb:mybb:1.1.8:*:*:*:*:*:*:*
• cpe:2.3:a:mybb:mybb:1.2:*:*:*:*:*:*:*
• cpe:2.3:a:mybb:mybb:1.2.0:*:*:*:*:*:*:*
• cpe:2.3:a:mybb:mybb:1.2.1:*:*:*:*:*:*:*
• cpe:2.3:a:mybb:mybb:1.2.2:*:*:*:*:*:*:*
• cpe:2.3:a:mybb:mybb:1.2.3:*:*:*:*:*:*:*
• cpe:2.3:a:mybb:mybb:1.2.4:*:*:*:*:*:*:*
• cpe:2.3:a:mybb:mybb:1.2.5:*:*:*:*:*:*:*
• cpe:2.3:a:mybb:mybb:1.2.6:*:*:*:*:*:*:*
• cpe:2.3:a:mybb:mybb:1.2.7:*:*:*:*:*:*:*
• cpe:2.3:a:mybb:mybb:1.2.8:*:*:*:*:*:*:*
• cpe:2.3:a:mybb:mybb:1.2.9:*:*:*:*:*:*:*
• cpe:2.3:a:mybb:mybb:1.2.10:*:*:*:*:*:*:*
• cpe:2.3:a:mybb:mybb:1.2.11:*:*:*:*:*:*:*
• cpe:2.3:a:mybb:mybb:1.2.12:*:*:*:*:*:*:*
• cpe:2.3:a:mybb:mybb:1.2.13:*:*:*:*:*:*:*
• cpe:2.3:a:mybb:mybb:1.2.14:*:*:*:*:*:*:*
• cpe:2.3:a:mybb:mybb:1.3:pre-1.0:*:*:*:*:*:*
• cpe:2.3:a:mybb:mybb:1.4.0:*:*:*:*:*:*:*
• cpe:2.3:a:mybb:mybb:1.4.1:*:*:*:*:*:*:*
• cpe:2.3:a:mybb:mybb:1.4.2:*:*:*:*:*:*:*
• cpe:2.3:a:mybb:mybb:1.4.3:*:*:*:*:*:*:*
• cpe:2.3:a:mybb:mybb:1.4.4:*:*:*:*:*:*:*
• cpe:2.3:a:mybb:mybb:1.4.5:*:*:*:*:*:*:*
• cpe:2.3:a:mybb:mybb:1.4.6:*:*:*:*:*:*:*
• cpe:2.3:a:mybb:mybb:1.4.7:*:*:*:*:*:*:*
• cpe:2.3:a:mybb:mybb:1.4.8:*:*:*:*:*:*:*
• cpe:2.3:a:mybb:mybb:1.4.9:*:*:*:*:*:*:*
• cpe:2.3:a:mybb:mybb:1.4.10:*:*:*:*:*:*:*
• cpe:2.3:a:mybb:mybb:1.4.11:*:*:*:*:*:*:*
• cpe:2.3:a:mybb:mybb:1.4.12:*:*:*:*:*:*:*

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