CVE-2019-17240

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2022-05-24. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Weaponized
9.8EG
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • Public exploit code is available (Exploit-DB (verified), epss top5pct, public exploit)
CISA-KEV: Not listedEPSS PROB: 40%CVSS: 9.8Exploit: Exploit-DB (verified) · epss top5pct · public exploitExposed services: Not assessed

A fix is available — apply it.

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.

CVSS v3
9.8
EG Score
9.8CRITICALmedium confidence
EG Risk
75
EG Risk 75/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity98% × 45%
Exploitation65% × 40%
Automatability30% × 15%
CISA SSVC: Track at low, Track* at medium and Attend at high mission impact.
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
40%
EPSS %ILE
98th
KEV
Not listed

CISA SSVCTrack at low, Track* at medium and Attend at high mission impact.

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation public PoC (EG-KEV: weaponized) · Automatable unknown (not published for this CVE) · Technical impact total (CVSS ≥ 9.0). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

October 6, 2019

Last Modified

November 21, 2024

Advisory Details (4)

Auto-updated Oct 5, 2026
🔬 Proof of concept available. Patch available. Sources: github_pr.
generic🟡 PoC Available

Bludit Brute Force Mitigation Bypass | rastating.github.io

https://rastating.github.io/bludit-brute-force-mitigation-bypass/
github_pr Patch Available

Remove use of headers that can be used to bypass anti-brute force controls

Patch available: bludit/bludit 4.0.0-alpha1 (PR #1090 merged 2019-10-05)

https://github.com/bludit/bludit/pull/1090
generic

Packet Storm

http://packetstormsecurity.com/files/159664/Bludit-3.9.2-Bruteforce-Mitigation-Bypass.html
generic

Packet Storm

http://packetstormsecurity.com/files/158875/Bludit-3.9.2-Authentication-Bruteforce-Mitigation-Bypass.html

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 5× in last 7d / 24× 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.

Showing the most recent 100 of 129 total refreshes for this CVE.

  1. 2026-10-09 20:03 UTCEPSS rescore
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  7. 2026-09-30 10:14 UTCEG score recompute
  8. 2026-09-27 18:00 UTCOSV refresh
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  1. 2026-09-06 13:44 UTCEPSS rescore
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  24. 2026-08-06 00:21 UTCOSV refresh
  25. 2026-08-05 19:13 UTCEPSS rescore
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  36. 2026-07-23 01:41 UTCEG score recompute
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  38. 2026-07-22 14:05 UTCEPSS rescore
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  44. 2026-07-19 14:28 UTCEPSS rescore
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  62. 2026-07-02 19:35 UTCOSV refresh
  63. 2026-07-01 15:03 UTCEPSS rescore
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  65. 2026-06-30 23:20 UTCEPSS rescore
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  75. 2026-06-23 21:30 UTCEPSS rescore

Publicly available exploits

(4 references)

Working exploit code is in the public domain (2 GitHub PoCs) (2 Exploit-DB entries). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Exploit-DBEDB-48942✓ verified
    First seen Oct 23, 2020

    Bludit 3.9.2 - Auth Bruteforce Bypass

    Open source ↗
  • Exploit-DBEDB-48746✓ verified
    First seen Aug 17, 2020

    Bludit 3.9.2 - Authentication Bruteforce Mitigation Bypass

    Open source ↗
  • GitHub PoCColdFusionX/CVE-2019-17240_Bludit-BF-Bypass
    First seen Oct 21, 2020

    Bludit <= 3.9.2 - Authentication Bruteforce Mitigation Bypass Exploit/PoC

    Open source ↗
  • GitHub PoCpingport80/CVE-2019-17240
    First seen Jun 8, 2020

    This is the exploit of CVE-2019-17240.

    Open source ↗

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2019-17240?
CVE-2019-17240 is a critical vulnerability published on October 6, 2019. 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.
When was CVE-2019-17240 disclosed?
CVE-2019-17240 was first published on October 6, 2019, 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-2019-17240 actively exploited?
CVE-2019-17240 is not currently on CISA's Known Exploited Vulnerabilities catalog. EchelonGraph's EG-KEV model classifies it as weaponized: a functional public exploit exists. FIRST EPSS estimates a 40% probability of exploitation in the next 30 days (98th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2019-17240?
CVE-2019-17240 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2019-17240?
A fix for CVE-2019-17240 is available: update to the fixed version the vendor names in its advisory.

Dependency Blast Radius

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