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01 Record

CVE-2023-36851

Junos OS: SRX Series: A vulnerability in J-Web allows an unauthenticated attacker to upload and download arbitrary files

MediumKEVPUBLISHEDCNA: juniper
CNA base score5.3 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

02 Description

Junos OS: SRX Series: A vulnerability in J-Web allows an unauthenticated attacker to upload and download arbitrary files

03 Exploitation and scoring

Exploitation
Exploited in the wild. Listed in the CISA Known Exploited Vulnerabilities catalog on 2023-11-13. Federal remediation due 2023-11-17.
SSVC decision
  • ExploitationactiveCISA reports credible evidence of active exploitation.
  • AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
  • Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
1.12% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 65.7% of scored records. A rank, not a probability.
NVD base score
5.3 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
NVD analysis status
Analyzed. 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
2023-09-26 19:53Z3 YR AGO
Last updated
2025-10-21 23:05Z1 YR AGO
Reserved
2023-06-27
Assigning CNA
juniper
Record state
PUBLISHED
Severity
Medium (CVSS 5.3)
CNA CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Weaknesses
  • CWE-306Missing Authentication for Critical FunctionBase
Data version
5.1
Document digest
e37b863819a0a629dec738416d7ead1959179d77c36be63b8a237fbe7a2e97e2

05 Affected products

VendorProductVersionsPlatforms
Juniper NetworksJunos OS21.2 to < 21.2R3-S8, 21.4 to < 21.4R3-S6, 22.1 to < 22.1R3-S5, 22.2 to < 22.2R3-S3, 22.3 to < 22.3R3-S2, 22.4 to < 22.4R2-S2, 22.4R3, 23.2 to < 23.2R1-S2, 23.2R2SRX Series

06 References

07 Remediation

The following software releases have been updated to resolve this specific issue: 21.2R3-S8*, 21.4R3-S6*, 22.1R3-S5*, 22.2R3-S3*, 22.3R3-S2*, 22.4R2-S2, 22.4R3*, 23.2R1-S2, 23.2R2*, 23.4R1, and all subsequent releases. *Pending Publication