What’s Vulnerable › Vulnerabilities

CVE-2011-3621

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-01-22 · updated 2026-06-16

Description

A reverse proxy issue exists in FluxBB before 1.4.7 when FORUM_BEHIND_REVERSE_PROXY is enabled.

Affected products

• FluxBB: before 1.4.7 — fixed in 1.4.7

How to fix

Upgrade to a fixed version: FluxBB 1.4.7. Check the vendor advisory for mitigations.

References

• https://fluxbb.org/forums/viewtopic.php?id=5751
• https://www.openwall.com/lists/oss-security/2011/10/18/8
• https://fluxbb.org/forums/viewtopic.php?id=5751
• https://www.openwall.com/lists/oss-security/2011/10/18/8

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