CVE-2018-7544

CRITICALNVD 9.19.1—
EchelonGraph scoreMEDIUM confidence

Score 9.1 from GitHub Security Advisory (severity: CRITICAL) published 2022-05-14. NVD baseline CVSS 9.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
9.1
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 2%CVSS: 9.1Exploit: NoneExposed: 0

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

A cross-protocol scripting issue was discovered in the management interface in OpenVPN through 2.4.5. When this interface is enabled over TCP without a password, and when no other clients are connected to this interface, attackers can execute arbitrary management commands, obtain sensitive information, or cause a denial of service (SIGTERM) by triggering XMLHttpRequest actions in a web browser. This is demonstrated by a multipart/form-data POST to http://localhost:23000 with a "signal SIGTERM" command in a TEXTAREA element. NOTE: The vendor disputes that this is a vulnerability. They state that this is the result of improper configuration of the OpenVPN instance rather than an intrinsic vulnerability, and now more explicitly warn against such configurations in both the management-interface documentation, and with a runtime warning

CVSS v3
9.1
EG Score
9.1(medium)
EPSS
77.2%
KEV
Not listed

Published

March 16, 2018

Last Modified

November 21, 2024

References (2)

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 48× 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. 2026-07-09 19:06 UTCEPSS rescore
  2. 2026-07-08 15:11 UTCEPSS rescore
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  8. 2026-07-06 02:20 UTCEPSS rescore
  9. 2026-07-05 02:27 UTCEPSS rescore
  10. 2026-07-04 11:56 UTCOSV refresh
  11. 2026-07-04 06:28 UTCEPSS rescore
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  13. 2026-07-01 15:03 UTCEPSS rescore
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  15. 2026-06-30 23:20 UTCEPSS rescore
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  21. 2026-06-27 03:06 UTCEPSS rescore
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  23. 2026-06-25 13:47 UTCEPSS rescore
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  1. 2026-06-24 14:02 UTCEPSS rescore
  2. 2026-06-23 21:30 UTCEPSS rescore
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  4. 2026-06-22 14:23 UTCEPSS rescore
  5. 2026-06-22 14:23 UTCEPSS rescore
  6. 2026-06-21 14:54 UTCEPSS rescore
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  8. 2026-06-21 01:57 UTCEPSS rescore
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  10. 2026-06-19 19:23 UTCEPSS rescore
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  12. 2026-06-18 17:50 UTCEPSS rescore
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  16. 2026-06-16 17:50 UTCEPSS rescore
  17. 2026-06-15 23:39 UTCOSV refresh
  18. 2026-06-15 17:45 UTCEPSS rescore
  19. 2026-06-14 23:15 UTCEPSS rescore
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  21. 2026-06-13 22:58 UTCEPSS rescore
  22. 2026-06-12 23:09 UTCEPSS rescore
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  24. 2026-06-11 13:57 UTCEPSS rescore
  25. 2026-06-10 22:16 UTCEPSS rescore
  26. 2026-06-10 13:19 UTCEPSS rescore
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  30. 2026-06-06 13:45 UTCEPSS rescore
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  38. 2026-06-02 20:11 UTCEPSS rescore
  39. 2026-06-01 13:50 UTCEPSS rescore
  40. 2026-05-31 22:29 UTCEPSS rescore
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  42. 2026-05-31 00:14 UTCEPSS rescore
  43. 2026-05-31 00:14 UTCEPSS rescore
  44. 2026-05-29 13:41 UTCEPSS rescore
  45. 2026-05-28 13:43 UTCEPSS rescore
  46. 2026-05-28 13:42 UTCEPSS rescore
  47. 2026-05-28 10:25 UTCEG score recompute
  48. 2026-05-28 10:24 UTCGHSA enrichment
  49. 2026-05-27 13:38 UTCEPSS rescore
  50. 2026-05-26 13:42 UTCEPSS rescore
  51. 2026-05-26 13:42 UTCEPSS rescore
  52. 2026-05-26 07:17 UTCEPSS rescore
  53. 2026-05-26 07:17 UTCEPSS rescore
  54. 2026-05-23 23:53 UTCOSV refresh

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2018-7544?
CVE-2018-7544 is a critical vulnerability published on March 16, 2018. A cross-protocol scripting issue was discovered in the management interface in OpenVPN through 2.4.5. When this interface is enabled over TCP without a password, and when no other clients are connected to this interface, attackers can execute arbitrary management commands, obtain sensitive…
When was CVE-2018-7544 disclosed?
CVE-2018-7544 was first published in the National Vulnerability Database on March 16, 2018, 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-2018-7544 actively exploited?
CVE-2018-7544 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 77.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2018-7544?
CVE-2018-7544 has a CVSS v3 base score of 9.1 (NVD).
How do I remediate CVE-2018-7544?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2018-7544, 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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