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CVE-2018-5223

25
FAUCET Score

CVE-2018-5223 is a critical vulnerability affecting Atlassian Fisheye and Crucible on Windows, stemming from improper validation of Mercurial repository URIs. An authenticated attacker with repository addition privileges can exploit this flaw to achieve arbitrary code execution on the host system. With a CVSS score of 7.2 (HIGH), this vulnerability presents a significant risk due to its high impact on confidentiality, integrity, and availability, requiring no user interaction once the repository is added. Despite its severity, there is currently no public exploit code available (Metasploit, Nuclei, ExploitDB), and it shows minimal community discussion or media coverage, indicating a low level of active exploitation or public awareness.

Impacted Technologies

VendorProductVersion(s)CPE
>= 4.4.0, < 4.4.6CPE matchmatch criteria
cpe:2.3:a:atlassian:fisheye:*:*:*:*:*:*:*:*
>= 4.5.0, < 4.5.3CPE matchmatch criteria
cpe:2.3:a:atlassian:fisheye:*:*:*:*:*:*:*:*
>= 4.4.0, < 4.4.6CPE matchmatch criteria
cpe:2.3:a:atlassian:crucible:*:*:*:*:*:*:*:*
>= 4.5.0, < 4.5.3CPE matchmatch criteria
cpe:2.3:a:atlassian:crucible:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.2HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.2
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
2.20%
Probability of exploitation in next 30 days
EPSS Percentile
80.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0220 is in the 77th percentile among its peer group of 5,537 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.3 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

Remediation records are not available for this CVE.

References

confluence.atlassian.com / x/aS5sO
Vendor Advisory
confluence.atlassian.com / x/Zi5sO
Vendor Advisory
jira.atlassian.com / browse/CRUC-8181
PatchVendor Advisory
jira.atlassian.com / browse/FE-7014
PatchVendor Advisory
securityfocus.com / bid/103665
Third Party AdvisoryVDB Entry