CVE-2017-2338 | ScreenOS: XSS vulnerability in ScreenOS Firewall

A persistent cross site scripting vulnerability in NetScreen WebUI of Juniper Networks Juniper NetScreen Firewall+VPN running ScreenOS allows a user with the 'security' role to inject HTML/JavaScript content into the management session of other users including the administrator. This enables the lower-privileged user to effectively execute commands with the permissions of an administrator. This issue affects Juniper Networks ScreenOS 6.3.0 releases prior to 6.3.0r24 on SSG Series. No other Juniper Networks products or platforms are affected by this issue.

Published: 2017-07-17 Last update: 2026-05-13 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2017-2338 is rated Moderate Risk (47.6/100): CVSS High severity, with low exploitation likelihood (EPSS 0.21%). 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-2017-2338

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 2025-03-30 0.31% 0.21% -0.10%
2 2025-03-29 0.18% 0.31% +0.13%
3 2025-03-17 — 0.18% —

Full EPSS history (6 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2017-2338

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
8.4 3.0 HIGH
CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:C/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:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:H)
They need powerful rights—admin, root, or similar—before this pays off.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
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.
 1.7 6.0 [email protected]
5.4 3.0 MEDIUM
CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N 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:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:N)
Service keeps running; no real outage angle.
 2.3 2.7 [email protected]
3.5 2.0 LOW
AV:N/AC:M/Au:S/C:N/I:P/A:N 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:N)
No confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:N)
No availability impact.
 6.8 2.9 [email protected]

Weakness enumeration for CVE-2017-2338

Affected software / configurations for CVE-2017-2338

Vendor Product Version Raw CPE
juniper screenos 6.3.0 cpe:2.3:o:juniper:screenos:6.3.0:*:*:*:*:*:*:*
juniper screenos 6.3.0 cpe:2.3:o:juniper:screenos:6.3.0:r1:*:*:*:*:*:*
juniper screenos 6.3.0 cpe:2.3:o:juniper:screenos:6.3.0:r10:*:*:*:*:*:*
juniper screenos 6.3.0 cpe:2.3:o:juniper:screenos:6.3.0:r11:*:*:*:*:*:*
juniper screenos 6.3.0 cpe:2.3:o:juniper:screenos:6.3.0:r12:*:*:*:*:*:*
juniper screenos 6.3.0 cpe:2.3:o:juniper:screenos:6.3.0:r13:*:*:*:*:*:*
juniper screenos 6.3.0 cpe:2.3:o:juniper:screenos:6.3.0:r14:*:*:*:*:*:*
juniper screenos 6.3.0 cpe:2.3:o:juniper:screenos:6.3.0:r15:*:*:*:*:*:*
juniper screenos 6.3.0 cpe:2.3:o:juniper:screenos:6.3.0:r16:*:*:*:*:*:*
juniper screenos 6.3.0 cpe:2.3:o:juniper:screenos:6.3.0:r17:*:*:*:*:*:*
juniper screenos 6.3.0 cpe:2.3:o:juniper:screenos:6.3.0:r18:*:*:*:*:*:*
juniper screenos 6.3.0 cpe:2.3:o:juniper:screenos:6.3.0:r19:*:*:*:*:*:*
juniper screenos 6.3.0 cpe:2.3:o:juniper:screenos:6.3.0:r2:*:*:*:*:*:*
juniper screenos 6.3.0 cpe:2.3:o:juniper:screenos:6.3.0:r21:*:*:*:*:*:*
juniper screenos 6.3.0 cpe:2.3:o:juniper:screenos:6.3.0:r22:*:*:*:*:*:*
juniper screenos 6.3.0 cpe:2.3:o:juniper:screenos:6.3.0:r23:*:*:*:*:*:*
juniper screenos 6.3.0 cpe:2.3:o:juniper:screenos:6.3.0:r23b:*:*:*:*:*:*
juniper screenos 6.3.0 cpe:2.3:o:juniper:screenos:6.3.0:r3:*:*:*:*:*:*
juniper screenos 6.3.0 cpe:2.3:o:juniper:screenos:6.3.0:r4:*:*:*:*:*:*
juniper screenos 6.3.0 cpe:2.3:o:juniper:screenos:6.3.0:r5:*:*:*:*:*:*
juniper screenos 6.3.0 cpe:2.3:o:juniper:screenos:6.3.0:r6:*:*:*:*:*:*
juniper screenos 6.3.0 cpe:2.3:o:juniper:screenos:6.3.0:r7:*:*:*:*:*:*
juniper screenos 6.3.0 cpe:2.3:o:juniper:screenos:6.3.0:r8:*:*:*:*:*:*
juniper screenos 6.3.0 cpe:2.3:o:juniper:screenos:6.3.0:r9:*:*:*:*:*:*

References for CVE-2017-2338

URL Tags
http://www.securityfocus.com/bid/99590 Third Party Advisory VDB Entry
http://www.securitytracker.com/id/1038881 Third Party Advisory VDB Entry
https://kb.juniper.net/JSA10782 Vendor Advisory
cvelogic Threat Intelligence