Medium severity · published Sep 28, 2018
CVE-2018-16586
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
4.3
CVSS
1.5%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
None
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.5% · higher than 74% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DL
Debian Linux · Debian
8.0; 9.0 · source: NVD
OT
Open Ticket Request System · Otrs
4.0.0 before 4.0.32; 5.0.0 before 5.0.30; 6.0.0 before 6.0.11 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2018-16586
CVE.org
https://www.cve.org/CVERecord?id=CVE-2018-16586
Patch
https://community.otrs.com/security-advisory-2018-05-security-update-for-otrs-framework/
Patch
https://github.com/OTRS/otrs/commit/09e80c7752b0d9080688e4597c7495dd109e0963
Patch
https://github.com/OTRS/otrs/commit/a808859a75c59ae3b7568f5cc4708c53462aa4c7
Patch
https://github.com/OTRS/otrs/commit/baa92df09145b8ae2702a3a0e85d8ba55ec96302
Mailing List
https://lists.debian.org/debian-lts-announce/2018/09/msg00033.html
Third Party Advisory
https://www.debian.org/security/2018/dsa-4317
More from Debian Linux
10.0
CVE-2025-32433
Erlang/OTP SSH Vulnerable to Pre-Authentication RCE
10.0
CVE-2025-24201
Apple Multiple Products WebKit Out-of-Bounds Write Vulnerability
10.0
CVE-2021-44228
Apache Log4j2 JNDI features do not protect against attacker controlled LDAP and other JNDI related endpoints
10.0
CVE-2015-3306
ProFTPD Improper Access Control Vulnerability
9.8
CVE-2026-111497
Out-of-Bounds Write in Google Brotli Decoder