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CVE-2018-16587

22
FAUCET Score

CVE-2018-16587 describes a vulnerability in Open Ticket Request System (OTRS) versions 4.0.x before 4.0.32, 5.0.x before 5.0.30, and 6.0.x before 6.0.11, affecting Debian-based systems. This medium-severity vulnerability (CVSS 6.5) allows an unauthenticated attacker to send a malicious email that, when opened by an administrator, can lead to the deletion of arbitrary files the OTRS web server user has write access to. While the attack requires user interaction, there is currently no evidence of active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
>= 4.0.0, < 4.0.32CPE matchmatch criteria
cpe:2.3:a:otrs:open_ticket_request_system:*:*:*:*:*:*:*:*
>= 5.0.0, < 5.0.30CPE matchmatch criteria
cpe:2.3:a:otrs:open_ticket_request_system:*:*:*:*:*:*:*:*
>= 6.0.0, < 6.0.11CPE matchmatch criteria
cpe:2.3:a:otrs:open_ticket_request_system:*:*:*:*:*:*:*:*
8.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
9.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

6.5MEDIUM

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.75%
Probability of exploitation in next 30 days
EPSS Percentile
75.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0175 is in the 87th percentile among its peer group of 26,219 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

community.otrs.com / security-advisory-2018-04-security-update-for-otrs-framework
PatchVendor Advisory
github.com / OTRS/otrs/commit/a4a1a01f84fac7ab032570ee50b660e2ebb15c01
Patch
github.com / OTRS/otrs/commit/d8cae00b0f78c2a07bb10cedb817304139395843
Patch
github.com / OTRS/otrs/commit/d9db0c6a15caafda7689320ecf61777993c33711
Patch
lists.debian.org / debian-lts-announce/2018/09/msg00033.html
Mailing ListThird Party Advisory
debian.org / security/2018/dsa-4317
Third Party Advisory