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CVE-2018-16586

18
FAUCET Score

CVE-2018-16586 is a medium-severity vulnerability affecting Open Ticket Request System (OTRS) versions 4.0.x, 5.0.x, and 6.0.x. It allows an attacker to send a malicious email that, when opened by a logged-in user, can cause their browser to load external image or CSS resources. The attack requires user interaction and has a low impact on integrity, with no confidentiality or availability impact. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

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

4.3MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
1.4
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.49%
Probability of exploitation in next 30 days
EPSS Percentile
71.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0149 is in the 84th 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-2018-05-security-update-for-otrs-framework
PatchVendor Advisory
github.com / OTRS/otrs/commit/09e80c7752b0d9080688e4597c7495dd109e0963
Patch
github.com / OTRS/otrs/commit/a808859a75c59ae3b7568f5cc4708c53462aa4c7
Patch
github.com / OTRS/otrs/commit/baa92df09145b8ae2702a3a0e85d8ba55ec96302
Patch
lists.debian.org / debian-lts-announce/2018/09/msg00033.html
Mailing ListThird Party Advisory
debian.org / security/2018/dsa-4317
Third Party Advisory