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CVE-2018-18398

18
FAUCET Score

CVE-2018-18398 describes an out-of-bounds read vulnerability in Xfce Thunar 1.6.15 when used with Xfce 4.12 and the IBus-Unikey input method for file searches. This flaw, categorized as a medium severity issue (CVSS 4.7), allows a local attacker to trigger a segmentation fault (SEGV) by creating specific files in /tmp before the victim uses the affected input method. While the attack complexity is high, it could lead to a denial of service. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.6.15CPE matchmatch criteria
cpe:2.3:a:xfce:thunar:*:*:*:*:*:*:*:*
< 4.12CPE matchmatch criteria
cpe:2.3:a:xfce:xfce:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

4.7MEDIUM

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

Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
1.0
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
0.32%
Probability of exploitation in next 30 days
EPSS Percentile
24.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0032 is in the 73rd percentile among its peer group of 1,296 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 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 0.4 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

0xd0ff9.wordpress.com / 2018/10/18/cve-2018-18398
ExploitThird Party Advisory