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01 Record

CVE-2020-12517

Phoenix Contact PLCnext Control Devices versions before 2021.0 LTS: An authenticated low privileged user could embed malicious Javascript code to gain admin rights when the admin user visits the vulnerable website (local privilege escalation).

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

02 Description

Phoenix Contact PLCnext Control Devices versions before 2021.0 LTS: An authenticated low privileged user could embed malicious Javascript code to gain admin rights when the admin user visits the vulnerable website (local privilege escalation).

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
1.12% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 65.9% of scored records. A rank, not a probability.
NVD base score
9.0 (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: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
2020-12-17 22:43Z5 YR AGO
Last updated
2024-09-16 22:10Z2 YR AGO
Reserved
2020-04-30
Assigning CNA
CERTVDE
Record state
PUBLISHED
Severity
High (CVSS 8.8)
CNA CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/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
af7c080b4d02be5a427f45d74570335e9828c8cdca80eee15513494a4fbc4ade

05 Affected products

VendorProductVersionsPlatforms
Phoenix ContactAXC F 1152 (1151412)< 2021.0 LTS—
Phoenix ContactAXC F 2152 (2404267)< 2021.0 LTS—
Phoenix ContactAXC F 3152 (1069208)< 2021.0 LTS—
Phoenix ContactRFC 4072S (1051328< 2021.0 LTS—
Phoenix ContactAXC F 2152 Starterkit (1046568)< 2021.0 LTS—
Phoenix ContactPLCnext Technology Starterkit (1188165)< 2021.0 LTS—

06 References

07 Remediation

Phoenix Contact recommends affected users to upgrade to the current Firmware 2021.0 LTS or higher which fixes these vulnerabilities.