Read the docs
TI-2020-17914 Aliases CVE-2020-35240GHSA-gq4f-x93r-43mj

FluxBB 1.5.11 is affected by cross-site scripting (XSS in the Blog Content component.

Priority LOW 24CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
High
User interaction
Required
Attack complexity
Low
Impact type
Cross-site scripting
Confidentiality · integrity · availability
Low · Low · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-79.

Summary

FluxBB 1.5.11 is affected by cross-site scripting (XSS in the Blog Content component. This vulnerability can allow an attacker to inject the XSS payload in "Blog Content" and each time any user will visit the blog, the XSS triggers and the attacker can able to steal the cookie according to the crafted payload.

Why it matters now

EPSS 0.0103 63rd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:fluxbb:fluxbb:1.5.11:*:*:*:*:*:*:*1.5.11VulnerableFluxBB
  • cpe:2.3:a:fluxbb:fluxbb:1.5.11:*:*:*:*:*:*:* Versions 1.5.11 Vulnerable ·FluxBB

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-35240
  2. 2026-10-03 Alias added: GHSA-gq4f-x93r-43mj

References

Exploit 1

Advisory 2

  • TI-2025-28590 FluxBB 1.5.11 is vulnerable to Cross Site Scripting (XSS) in via the Forum Description Field in admin_forums.php. CVSS 3.1MEDIUM 5.4
  • TI-2014-07771 Directory traversal vulnerability in install.php in FluxBB before 1.5.8 allows remote… CVSS 2.0HIGH 9.3
  • TI-2011-03195 A reverse proxy issue exists in FluxBB before 1.4.7 when FORUM_BEHIND_REVERSE_PROXY is enabled. CVSS 3.1CRITICAL 9.8
  • TI-2014-08191 SQL injection vulnerability in profile.php in FluxBB before 1.4.13 and 1.5.x before 1.5.7… CVSS 2.0HIGH 7.5
  • TI-2020-17425 Fluxbb 1.5.11 is affected by a denial of service (DoS) vulnerability by sending an… CVSS 3.1HIGH 7.5
  • TI-2014-08192 Open redirect vulnerability in forums/login.php in FluxBB before 1.4.13 and 1.5.x before… CVSS 2.0MEDIUM 5.8
See all 7 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences