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Fencer Intel
high 8.8

CVE-2020-12517 json

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).

published 5y ago modified 4mo ago also EUVD-2020-4819

cvss
8.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.1%
EPSS 1.1% chance of exploitation in 30 days, percentile 66%
public exploits
0
none known

Summary

On 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).

Patch / fix

  • Phoenix Contact AXC F 1152 (1151412) 2021.0 LTS
  • Phoenix Contact AXC F 2152 (2404267) 2021.0 LTS
  • Phoenix Contact AXC F 3152 (1069208) 2021.0 LTS
  • Phoenix Contact RFC 4072S (1051328 2021.0 LTS
  • Phoenix Contact AXC F 2152 Starterkit (1046568) 2021.0 LTS
  • Phoenix Contact PLCnext Technology Starterkit (1188165) 2021.0 LTS

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Exploit prediction

1.12% chance of exploitation in the next 30 days, higher than 66% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 9.0 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
NVD 2.0 6.0 AV:N/AC:M/Au:S/C:P/I:P/A:P

Affected products

  • Phoenix Contact AXC F 1152 (1151412)
  • Phoenix Contact AXC F 2152 (2404267)
  • Phoenix Contact AXC F 3152 (1069208)
  • Phoenix Contact RFC 4072S (1051328
  • Phoenix Contact AXC F 2152 Starterkit (1046568)
  • Phoenix Contact PLCnext Technology Starterkit (1188165)

Classification

Weakness
  • CWE-79 Improper Neutralization of Input During Web Page Generation

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.