01 Record

CVE-2021-31373

Junos OS: SRX Series: Persistent XSS vulnerability in J-Web

HighPUBLISHEDCNA: juniper

CNA base score8.0 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

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02 Description

Junos OS: SRX Series: Persistent XSS vulnerability in J-Web

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: 0.80% probability of exploitation activity in the next 30 days.
EPSS percentile: Equal to or higher than the score of 56.4% of scored records. A rank, not a probability.
NVD base score: 5.4 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
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

2021-10-19 18:17Z5 YR AGO

Last updated

2024-09-16 18:34Z2 YR AGO

Reserved

2021-04-15

Assigning CNA

juniper

Record state

PUBLISHED

Severity

High (CVSS 8.0)

CNA CVSS vector

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

Weaknesses

CWE-20Improper Input ValidationClass
CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')Base

Data version

5.1

Document digest

22c34a62b34454ebfebefe3b47888b16e322795ca4cec25b52fa61896217c511

05 Affected products

VendorProductVersionsPlatforms

Juniper NetworksJunos OS18.2 to < 18.2R3-S8, 18.3 to < 18.3R3-S5, 18.4 to < 18.4R3-S8, 19.1 to < 19.1R3-S5, 19.2 to < 19.2R1-S7, 19.2R3-S3, 19.3 to < 19.3R2-S6, 19.3R3-S3, 19.4 to < 19.4R1-S4, 19.4R2-S4, 19.4R3-S3, 20.1 to < 20.1R2-S2, 20.1R3, 20.2 to < 20.2R3-S1, 20.3 to < 20.3R2-S1, 20.3R3SRX Series

06 References

kb.juniper.nethttps://kb.juniper.net/JSA11238x_refsource_CONFIRM

07 Remediation

The following software releases have been updated to resolve this specific issue: 18.2R3-S8, 18.3R3-S5, 18.4R3-S8, 19.1R3-S5, 19.2R1-S7, 19.2R3-S3, 19.3R2-S6, 19.3R3-S3, 19.4R1-S4, 19.4R2-S4, 19.4R3-S3, 20.1R2-S2, 20.1R3, 20.2R3-S1, 20.3R2-S1, 20.3R3, 20.4R1, and all subsequent releases.