CVE-2011-3621

CRITICALNVD 9.89.8—

9.8

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

CVSS v3: 9.8
EG Score: 9.8(medium)
EPSS: 70.1%
KEV: Not listed

Published

January 22, 2020

Last Modified

November 21, 2024

Advisory Details (1)

Auto-updated Jun 3, 2026

No patch confirmed yet.

generic

oss-security - Re: CVE request: fluxbb before 1.4.7

https://www.openwall.com/lists/oss-security/2011/10/18/8

Data Freshness Timeline

(refreshed 11× in last 7d / 20× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

2026-06-08 14:14 UTCEPSS rescore
2026-06-08 14:14 UTCEPSS rescore
2026-06-07 15:22 UTCEPSS rescore
2026-06-07 15:22 UTCEPSS rescore
2026-06-06 13:45 UTCEPSS rescore
2026-06-06 13:44 UTCEPSS rescore
2026-06-05 22:44 UTCEPSS rescore
2026-06-05 06:08 UTCEPSS rescore
2026-06-05 06:07 UTCEPSS rescore
2026-06-04 13:09 UTCEPSS rescore
2026-06-04 13:09 UTCEPSS rescore
2026-06-02 20:10 UTCEPSS rescore
2026-06-02 20:10 UTCEPSS rescore
2026-05-31 22:28 UTCEPSS rescore
2026-05-31 22:28 UTCEPSS rescore
2026-05-31 00:14 UTCEPSS rescore
2026-05-31 00:14 UTCEPSS rescore
2026-05-29 13:41 UTCEPSS rescore
2026-05-29 13:40 UTCEPSS rescore
2026-05-28 13:42 UTCEPSS rescore

Frequently asked(5)

What is CVE-2011-3621?

CVE-2011-3621 is a critical vulnerability published on January 22, 2020. A reverse proxy issue exists in FluxBB before 1.4.7 when FORUMBEHINDREVERSE_PROXY is enabled.

When was CVE-2011-3621 disclosed?

CVE-2011-3621 was first published in the National Vulnerability Database on January 22, 2020, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2011-3621 actively exploited?

CVE-2011-3621 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 70.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2011-3621?

CVE-2011-3621 has a CVSS v3 base score of 9.8 (NVD).

How do I remediate CVE-2011-3621?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2011-3621, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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CVE-2011-3621

📅 Published

🔄 Last Modified

📋 Advisory Details (1)