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Public proof of concept

CVE-2019-17240

A public proof of concept exists; no exploitation attested.

  • Published2019-10-06
  • WeaknessCWE-307

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

bl-kernel/security.class.php in Bludit 3.9.2 allows attackers to bypass a brute-force protection mechanism by using many different forged X-Forwarded-For or Client-IP HTTP headers.

Timeline

dates in UTC
  1. 2019-10-0619:15CVE publishedNVD
  2. 2020-08-17Exploit-DB entryExploit-DB

Observed activity

isMalicious corpus · updated 2026-11-03 09:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2019-17240?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2019-17240?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Bludit
BranchAffectedFixed in
3.9= 3.9.2no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

No fix published by the sources we read yet. NVD record

Detection

read 2026-11-02 22:42 UTC
Nuclei template
none so far
ProjectDiscovery
Exploit-DB
EDB-48746EDB-48942
Exploit-DB
Proof-of-concept repositories
9 repositories, unverifiedpingport80/CVE-2019-17240LucaReggiannini/Bludit-3-9-2-bbtriple-octopus/Bludit-CVE-2019-17240-ForkColdFusionX/CVE-2019-17240_Bludit-BF-Bypassjayngng/bludit-CVE-2019-17240
PoC-in-GitHub
Metasploit modules
none listed
Metasploit Framework

Sources

  • NVDCVSS 3.19.8read 2026-10-23
  • CNACVSS 3.03.7known since 2026-10-23
  • NVDCVSS 2.04.3read 2026-10-23
  • NVDweakness (CWE)CWE-307read 2026-10-23
  • FIRST EPSSEPSS score40.7 %read 2026-11-02
  • PoC-in-GitHubproof of concept9read 2026-11-02
  • Exploit-DBdetectionread 2026-11-02

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
2019-10-06
Last Modified
2026-06-17
NVD status
Modified

Frequently asked questions

What is CVE-2019-17240?

bl-kernel/security.class.php in Bludit 3.9.2 allows attackers to bypass a brute-force protection mechanism by using many different forged X-Forwarded-For or Client-IP HTTP headers.

Is CVE-2019-17240 actively exploited?

Active exploitation of CVE-2019-17240 has not been confirmed. Its EPSS score was 40.7% on 2026-11-02, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2019-17240?

CVE-2019-17240 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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