How severe is CVE-2018-0059?

CVE-2018-0059 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2018-0059 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-0059?

CVE-2018-0059 primarily affects Juniper Netscreen Screenos. In total, 27 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2018-0059?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2018-0059 published?

CVE-2018-0059 was published on 2018-10-10 and last updated on 2026-06-17.

CVE-2018-0059

CVE-2018-0059 is a medium-severity vulnerability in Juniper Netscreen Screenos with a CVSS 3.x base score of 5.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 5.4)
CVSS v2: 3.5
EPSS exploit prediction: 1% (52nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Juniper Netscreen Screenos
Published: 2018-10-10
Last modified: 2026-06-17

Description

A persistent cross-site scripting vulnerability in the graphical user interface of ScreenOS may allow a remote authenticated user to inject web script or HTML and steal sensitive data and credentials from a web administration session, possibly tricking a follow-on administrative user to perform administrative actions on the device. Affected releases are Juniper Networks ScreenOS 6.3.0 versions prior to 6.3.0r26.

Frequently asked questions

What is CVE-2018-0059?: A persistent cross-site scripting vulnerability in the graphical user interface of ScreenOS may allow a remote authenticated user to inject web script or HTML and steal sensitive data and credentials from a web administration session, possibly tricking a follow-on administrative user to perform administrative actions on the device. Affected releases are Juniper Networks ScreenOS 6.3.0 versions prior to 6.3.0r26.
How severe is CVE-2018-0059?: CVE-2018-0059 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2018-0059 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-0059?: CVE-2018-0059 primarily affects Juniper Netscreen Screenos. In total, 27 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2018-0059?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2018-0059 published?: CVE-2018-0059 was published on 2018-10-10 and last updated on 2026-06-17.

References

https://kb.juniper.net/JSA10894

Affected products (27)

cpe:2.3:o:juniper:netscreen_screenos:6.3.0:*:*:*:*:*:*:*
cpe:2.3:o:juniper:netscreen_screenos:6.3.0r1:*:*:*:*:*:*:*
cpe:2.3:o:juniper:netscreen_screenos:6.3.0r2:*:*:*:*:*:*:*
cpe:2.3:o:juniper:netscreen_screenos:6.3.0r3:*:*:*:*:*:*:*
cpe:2.3:o:juniper:netscreen_screenos:6.3.0r4:*:*:*:*:*:*:*
cpe:2.3:o:juniper:netscreen_screenos:6.3.0r5:*:*:*:*:*:*:*
cpe:2.3:o:juniper:netscreen_screenos:6.3.0r6:*:*:*:*:*:*:*
cpe:2.3:o:juniper:netscreen_screenos:6.3.0r7:*:*:*:*:*:*:*
cpe:2.3:o:juniper:netscreen_screenos:6.3.0r8:*:*:*:*:*:*:*
cpe:2.3:o:juniper:netscreen_screenos:6.3.0r9:*:*:*:*:*:*:*
cpe:2.3:o:juniper:netscreen_screenos:6.3.0r10:*:*:*:*:*:*:*
cpe:2.3:o:juniper:netscreen_screenos:6.3.0r11:*:*:*:*:*:*:*
cpe:2.3:o:juniper:netscreen_screenos:6.3.0r12:*:*:*:*:*:*:*
cpe:2.3:o:juniper:netscreen_screenos:6.3.0r13:*:*:*:*:*:*:*
cpe:2.3:o:juniper:netscreen_screenos:6.3.0r14:*:*:*:*:*:*:*
cpe:2.3:o:juniper:netscreen_screenos:6.3.0r15:*:*:*:*:*:*:*
cpe:2.3:o:juniper:netscreen_screenos:6.3.0r16:*:*:*:*:*:*:*
cpe:2.3:o:juniper:netscreen_screenos:6.3.0r17:*:*:*:*:*:*:*
cpe:2.3:o:juniper:netscreen_screenos:6.3.0r18:*:*:*:*:*:*:*
cpe:2.3:o:juniper:netscreen_screenos:6.3.0r19:*:*:*:*:*:*:*
cpe:2.3:o:juniper:netscreen_screenos:6.3.0r21:*:*:*:*:*:*:*
cpe:2.3:o:juniper:netscreen_screenos:6.3.0r22:*:*:*:*:*:*:*
cpe:2.3:o:juniper:netscreen_screenos:6.3.0r23:*:*:*:*:*:*:*
cpe:2.3:o:juniper:netscreen_screenos:6.3.0r23b1:*:*:*:*:*:*:*
cpe:2.3:o:juniper:netscreen_screenos:6.3.0r24:*:*:*:*:*:*:*
cpe:2.3:o:juniper:netscreen_screenos:6.3.0r24b1:*:*:*:*:*:*:*
cpe:2.3:o:juniper:netscreen_screenos:6.3.0r25:*:*:*:*:*:*:*

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