What’s Vulnerable › Vulnerabilities

CVE-2018-16586

• Severity: medium (CVSS 4.3 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2018-09-28 · updated 2026-06-17

Description

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.

Affected products

• Debian Linux: 8.0, 9.0
• Otrs Open Ticket Request System: from 4.0.0 before 4.0.32; from 5.0.0 before 5.0.30; from 6.0.0 before 6.0.11 — fixed in 4.0.32, 5.0.30, 6.0.11

How to fix

Upgrade to a fixed version: Otrs Open Ticket Request System 4.0.32, 5.0.30, 6.0.11. Check the vendor advisory for mitigations.

References

• https://community.otrs.com/security-advisory-2018-05-security-update-for-otrs-framework/
• https://github.com/OTRS/otrs/commit/09e80c7752b0d9080688e4597c7495dd109e0963
• https://github.com/OTRS/otrs/commit/a808859a75c59ae3b7568f5cc4708c53462aa4c7
• https://github.com/OTRS/otrs/commit/baa92df09145b8ae2702a3a0e85d8ba55ec96302
• https://lists.debian.org/debian-lts-announce/2018/09/msg00033.html
• https://www.debian.org/security/2018/dsa-4317
• https://community.otrs.com/security-advisory-2018-05-security-update-for-otrs-framework/
• https://github.com/OTRS/otrs/commit/09e80c7752b0d9080688e4597c7495dd109e0963
• https://github.com/OTRS/otrs/commit/a808859a75c59ae3b7568f5cc4708c53462aa4c7
• https://github.com/OTRS/otrs/commit/baa92df09145b8ae2702a3a0e85d8ba55ec96302
• https://lists.debian.org/debian-lts-announce/2018/09/msg00033.html
• https://www.debian.org/security/2018/dsa-4317

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