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
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 40%CVSS: 9.8Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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
9.8(medium)
EPSS
98.4%
KEV
Not listed

Published

October 6, 2019

Last Modified

November 21, 2024

Advisory Details (2)

Auto-updated Jun 18, 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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 3× in last 7d / 29× 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.

  1. 2026-07-11 08:24 UTCEPSS rescore
  2. 2026-07-11 08:24 UTCEPSS rescore
  3. 2026-07-09 19:06 UTCEPSS rescore
  4. 2026-07-05 02:27 UTCEPSS rescore
  5. 2026-07-02 19:35 UTCOSV refresh
  6. 2026-07-01 15:03 UTCEPSS rescore
  7. 2026-07-01 15:03 UTCEPSS rescore
  8. 2026-06-30 23:20 UTCEPSS rescore
  9. 2026-06-28 14:04 UTCEPSS rescore
  10. 2026-06-28 04:54 UTCEPSS rescore
  11. 2026-06-28 04:54 UTCEPSS rescore
  12. 2026-06-27 03:06 UTCEPSS rescore
  13. 2026-06-25 13:47 UTCEPSS rescore
  14. 2026-06-25 13:47 UTCEPSS rescore
  15. 2026-06-24 14:03 UTCEPSS rescore
  16. 2026-06-24 14:03 UTCEPSS rescore
  17. 2026-06-23 21:31 UTCEPSS rescore
  18. 2026-06-23 21:30 UTCEPSS rescore
  19. 2026-06-22 14:23 UTCEPSS rescore
  20. 2026-06-21 01:57 UTCEPSS rescore
  21. 2026-06-21 01:57 UTCEPSS rescore
  22. 2026-06-18 17:50 UTCEPSS rescore
  23. 2026-06-17 17:50 UTCEPSS rescore
  24. 2026-06-16 17:50 UTCEPSS rescore
  25. 2026-06-15 17:45 UTCEPSS rescore
Show 22 more
  1. 2026-06-14 23:15 UTCEPSS rescore
  2. 2026-06-14 23:15 UTCEPSS rescore
  3. 2026-06-14 17:13 UTCOSV refresh
  4. 2026-06-12 23:09 UTCEPSS rescore
  5. 2026-06-10 22:16 UTCEPSS rescore
  6. 2026-06-08 14:15 UTCEPSS rescore
  7. 2026-06-07 15:23 UTCEPSS rescore
  8. 2026-06-07 15:23 UTCEPSS rescore
  9. 2026-06-06 13:45 UTCEPSS rescore
  10. 2026-06-06 13:45 UTCEPSS rescore
  11. 2026-06-05 22:45 UTCEPSS rescore
  12. 2026-06-05 22:45 UTCEPSS rescore
  13. 2026-06-05 06:08 UTCEPSS rescore
  14. 2026-06-05 06:08 UTCEPSS rescore
  15. 2026-06-01 13:50 UTCEPSS rescore
  16. 2026-06-01 13:50 UTCEPSS rescore
  17. 2026-05-31 00:14 UTCEPSS rescore
  18. 2026-05-31 00:14 UTCEPSS rescore
  19. 2026-05-28 13:43 UTCEPSS rescore
  20. 2026-05-27 13:38 UTCEPSS rescore
  21. 2026-05-27 13:23 UTCEG score recompute
  22. 2026-05-27 13:23 UTCGHSA enrichment

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

    Bludit 3.9.2 - Authentication Bruteforce Mitigation Bypass

    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 in the National Vulnerability Database 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. FIRST EPSS estimates a 98.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
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?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2019-17240, 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.

Dependency Blast Radius

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