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.
- 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
- supportportal.juniper.nethttps://supportportal.juniper.net/JSA72300
- www.cisa.govhttps://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-36851
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