01 Record

CVE-2021-0275

Junos OS: J-Web: Cross-site scripting attack allows an attacker to gain control of another users session.

HighPUBLISHEDCNA: juniper

CNA base score8.8 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

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02 Description

Junos OS: J-Web: Cross-site scripting attack allows an attacker to gain control of another users session.

03 Exploitation and scoring

Exploitation: Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
SSVC decision: Not assessed by CISA
EPSS probability: 1.17% probability of exploitation activity in the next 30 days.
EPSS percentile: Equal to or higher than the score of 67.3% of scored records. A rank, not a probability.
NVD base score: 8.8 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD analysis status: Modified. NVD last modified this record on 2026-06-17.
Red Hat severity: No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published

2021-04-22 19:37Z5 YR AGO

Last updated

2024-09-17 00:41Z2 YR AGO

Reserved

2020-10-27

Assigning CNA

juniper

Record state

PUBLISHED

Severity

High (CVSS 8.8)

CNA CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Weaknesses

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')Base

Data version

5.1

Document digest

20e2c5f41fd699df4fa55d4258ca35f4332f3540625fe7bbe99875edd45cd2c7

05 Affected products

VendorProductVersionsPlatforms

Juniper NetworksJunos OS12.3 to < 12.3R12-S15, 15.1 to < 15.1R7-S6, 12.3X48 to < 12.3X48-D95, 15.1X49 to < 15.1X49-D200, 16.1 to < 16.1R7-S7, 16.2 to < 16.2R2-S11, 16.2R3, 17.1 to < 17.1R2-S11, 17.1R3-S2, 17.2 to < 17.2R3-S3, 17.3 to < 17.3R2-S5, 17.3R3-S7, 17.4 to < 17.4R2-S9, 17.4R3, 18.1 to < 18.1R3-S9, 18.2 to < 18.2R2-S7, 18.2R3-S3, 18.3 to < 18.3R1-S7, 18.3R2-S3, 18.3R3-S1, 18.4 to < 18.4R1-S6, 18.4R2-S4, 18.4R3, 19.1 to < 19.1R2-S1, 19.1R3, 19.2 to < 19.2R1-S3, 19.2R2, 19.3 to < 19.3R2EX Series, SRX Series

06 References

kb.juniper.nethttps://kb.juniper.net/JSA11166x_refsource_MISC

07 Remediation

The following software releases have been updated to resolve this specific issue: Junos OS 12.3R12-S15, 12.3X48-D95, 15.1R7-S6, 15.1X49-D200, 16.1R7-S7, 16.2R2-S11, 16.2R3, 17.1R2-S11, 17.1R3-S2, 17.2R3-S3, 17.3R2-S5, 17.3R3-S7, 17.4R2-S9, 17.4R3, 18.1R3-S9, 18.2R2-S7, 18.2R3-S3, 18.3R1-S7, 18.3R2-S3, 18.3R3-S1, 18.4R1-S6, 18.4R2-S4, 18.4R3, 19.1R2-S1, 19.1R3, 19.2R1-S3, 19.2R2, 19.3R2, 19.4R1, and all subsequent releases.