CVE-2018-16586

MEDIUMNVD 4.34.3—
EchelonGraph scoreMEDIUM confidence

Score 4.3 from GitHub Security Advisory published 2022-05-13. NVD baseline CVSS 4.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
4.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 4.3Exploit: None knownExposed: 0

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

In Open Ticket Request System (OTRS) 4.0.x before 4.0.32, 5.0.x before 5.0.30, and 6.0.x before 6.0.11, an attacker could send a malicious email to an OTRS system. If a logged in user opens it, the email could cause the browser to load external image or CSS resources.

CVSS v3
4.3
EG Score
4.3(medium)
EG Risk
24(Track)
EG Risk 24/100SSVC: Track

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
Severity43% × 45%
Exploitation1% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
72%
KEV
Not listed

Published

September 28, 2018

Last Modified

November 21, 2024

References (12)

Affected Packages

(3 across 3 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
otrs22.0.4p01-10 ... 6.0.9-1~bpo9+1 (211 versions)6.0.11-1—
Debian:8(1)
PackageVulnerable rangeFixed inDependents
otrs23.3.10-1 ... 3.3.9-3+deb8u1 (12 versions)3.3.18-1+deb8u6—
Debian:9(1)
PackageVulnerable rangeFixed inDependents
otrs22.0.4p01-10 ... 5.0.9+repack1-1 (192 versions)5.0.16-1+deb9u6—

Data Freshness Timeline

(refreshed 7× 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.

Showing the most recent 100 of 121 total refreshes for this CVE.

  1. 2026-08-20 22:51 UTCEPSS rescore
  2. 2026-08-19 17:00 UTCEPSS rescore
  3. 2026-08-18 13:43 UTCEPSS rescore
  4. 2026-08-17 13:42 UTCEPSS rescore
  5. 2026-08-16 14:51 UTCEPSS rescore
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  16. 2026-08-06 12:10 UTCOSV refresh
  17. 2026-08-04 15:05 UTCEPSS rescore
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  20. 2026-07-30 16:24 UTCEPSS rescore
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  1. 2026-07-23 14:15 UTCEPSS rescore
  2. 2026-07-23 14:15 UTCEPSS rescore
  3. 2026-07-23 01:34 UTCEG score recompute
  4. 2026-07-22 22:14 UTCEG score recompute
  5. 2026-07-22 14:04 UTCEPSS rescore
  6. 2026-07-21 15:21 UTCEPSS rescore
  7. 2026-07-21 05:17 UTCOSV refresh
  8. 2026-07-20 17:04 UTCEPSS rescore
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  10. 2026-07-19 14:28 UTCEPSS rescore
  11. 2026-07-19 02:26 UTCEPSS rescore
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  13. 2026-07-16 16:59 UTCEPSS rescore
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  18. 2026-07-13 06:10 UTCEPSS rescore
  19. 2026-07-12 05:43 UTCEPSS rescore
  20. 2026-07-11 08:24 UTCEPSS rescore
  21. 2026-07-09 19:06 UTCEPSS rescore
  22. 2026-07-08 15:11 UTCEPSS rescore
  23. 2026-07-07 13:42 UTCEPSS rescore
  24. 2026-07-07 13:42 UTCEPSS rescore
  25. 2026-07-06 16:24 UTCEPSS rescore
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  27. 2026-07-06 02:20 UTCEPSS rescore
  28. 2026-07-05 02:27 UTCEPSS rescore
  29. 2026-07-04 06:28 UTCEPSS rescore
  30. 2026-07-04 00:26 UTCOSV refresh
  31. 2026-07-02 16:54 UTCEPSS rescore
  32. 2026-07-01 15:03 UTCEPSS rescore
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  34. 2026-06-30 23:19 UTCEPSS rescore
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  36. 2026-06-29 14:03 UTCEPSS rescore
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  38. 2026-06-28 04:53 UTCEPSS rescore
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  40. 2026-06-27 03:06 UTCEPSS rescore
  41. 2026-06-25 13:47 UTCEPSS rescore
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  43. 2026-06-24 14:02 UTCEPSS rescore
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  45. 2026-06-23 21:30 UTCEPSS rescore
  46. 2026-06-21 14:54 UTCEPSS rescore
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  48. 2026-06-21 01:57 UTCEPSS rescore
  49. 2026-06-21 01:57 UTCEPSS rescore
  50. 2026-06-19 19:23 UTCEPSS rescore
  51. 2026-06-18 17:50 UTCEPSS rescore
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  53. 2026-06-17 17:50 UTCEPSS rescore
  54. 2026-06-17 17:50 UTCEPSS rescore
  55. 2026-06-16 17:50 UTCEPSS rescore
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  57. 2026-06-15 17:45 UTCEPSS rescore
  58. 2026-06-15 12:43 UTCOSV refresh
  59. 2026-06-14 23:14 UTCEPSS rescore
  60. 2026-06-14 23:14 UTCEPSS rescore
  61. 2026-06-13 22:58 UTCEPSS rescore
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  63. 2026-06-12 23:09 UTCEPSS rescore
  64. 2026-06-11 13:57 UTCEPSS rescore
  65. 2026-06-10 22:16 UTCEPSS rescore
  66. 2026-06-10 13:19 UTCEPSS rescore
  67. 2026-06-08 14:14 UTCEPSS rescore
  68. 2026-06-08 14:14 UTCEPSS rescore
  69. 2026-06-07 15:22 UTCEPSS rescore
  70. 2026-06-07 15:22 UTCEPSS rescore
  71. 2026-06-06 13:45 UTCEPSS rescore
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  73. 2026-06-05 22:45 UTCEPSS rescore
  74. 2026-06-05 22:44 UTCEPSS rescore
  75. 2026-06-05 06:08 UTCEPSS rescore

Frequently asked(5)

What is CVE-2018-16586?
CVE-2018-16586 is a medium vulnerability published on September 28, 2018. In Open Ticket Request System (OTRS) 4.0.x before 4.0.32, 5.0.x before 5.0.30, and 6.0.x before 6.0.11, an attacker could send a malicious email to an OTRS system. If a logged in user opens it, the email could cause the browser to load external image or CSS resources.
When was CVE-2018-16586 disclosed?
CVE-2018-16586 was first published in the National Vulnerability Database on September 28, 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-2018-16586 actively exploited?
CVE-2018-16586 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 28.0% of all scored CVEs.
What is the CVSS score of CVE-2018-16586?
CVE-2018-16586 has a CVSS v3 base score of 4.3 (NVD).
How do I remediate CVE-2018-16586?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2018-16586, 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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