Critical severity · published Jan 22, 2020
CVE-2011-3621
A reverse proxy issue exists in FluxBB before 1.4.7 when FORUM_BEHIND_REVERSE_PROXY is enabled
9.8
CVSS
1.2%
EPSS
No
On KEV
Description
A reverse proxy issue exists in FluxBB before 1.4.7 when FORUM_BEHIND_REVERSE_PROXY is enabled.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.2% · higher than 68% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FL
Fluxbb · Fluxbb
before 1.4.7 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2011-3621
CVE.org
https://www.cve.org/CVERecord?id=CVE-2011-3621
Vendor Advisory
https://fluxbb.org/forums/viewtopic.php?id=5751
Mailing List
https://www.openwall.com/lists/oss-security/2011/10/18/8
More from Fluxbb
7.5
CVE-2020-28873
Fluxbb 1.5.11 is affected by a denial of service (DoS) vulnerability by sending an extremely long password via the user login form
6.1
CVE-2021-43677
Fluxbb v1.4.12 is affected by a Cross Site Scripting (XSS) vulnerability
5.4
CVE-2025-44110
FluxBB 1.5.11 is vulnerable to Cross Site Scripting (XSS) in via the Forum Description Field in admin_forums.php
4.8
CVE-2020-35240
FluxBB 1.5.11 is affected by cross-site scripting (XSS in the Blog Content component
–
CVE-2014-9574
Directory traversal vulnerability in install.php in FluxBB before 1.5.8 allows remote attackers to include and execute arbitrary local install.php files via a
