CVE-2017-18087

The download commit resource in Atlassian Bitbucket Server from version 5.1.0 before version 5.1.7, from version 5.2.0 before version 5.2.5, from version 5.3.0 before version 5.3.3 and from version 5.4.0 before version 5.4.1 allows remote attackers to write files to disk potentially allowing them to gain code execution, exploit CVE-2017-1000117 if a vulnerable version of git is in use, and or determine if an internal service exists via an argument injection vulnerability in the at parameter.

Published: 2018-02-15 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2017-18087 is rated Moderate Risk (57/100): CVSS High severity, with medium exploitation likelihood (EPSS 1.86%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2017-18087

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 1.58% 1.86% +0.27%
2 2026-06-14 1.78% 1.58% -0.20%
3 2026-06-13 — 1.78% —

Full EPSS history (21 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2017-18087

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.0 HIGH
CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.6 5.9 [email protected]
6.0 2.0 MEDIUM
AV:N/AC:M/Au:S/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:S)
A single authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 6.8 6.4 [email protected]

Weakness enumeration for CVE-2017-18087

Affected software / configurations for CVE-2017-18087

Vendor Product Version Raw CPE
atlassian bitbucket >= 5.1.0, < 5.1.7 cpe:2.3:a:atlassian:bitbucket:*:*:*:*:*:*:*:*
atlassian bitbucket >= 5.2.0, < 5.2.5 cpe:2.3:a:atlassian:bitbucket:*:*:*:*:*:*:*:*
atlassian bitbucket >= 5.3.0, < 5.3.3 cpe:2.3:a:atlassian:bitbucket:*:*:*:*:*:*:*:*
atlassian bitbucket > 5.4.0, < 5.4.1 cpe:2.3:a:atlassian:bitbucket:*:*:*:*:*:*:*:*

References for CVE-2017-18087

URL Tags
http://www.securityfocus.com/bid/103038 Third Party Advisory VDB Entry
https://jira.atlassian.com/browse/BSERV-10593 Vendor Advisory
cvelogic Threat Intelligence