CVE-2020-12517
CVE-2020-12517 is a high-severity vulnerability in Phoenixcontact Plcnext Firmware with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.
Key facts
- Severity: High (CVSS 3.x base score 8.8)
- CVSS v2: 6.0
- EPSS exploit prediction: 1% (65th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-79
- Affected product: Phoenixcontact Plcnext Firmware
- Published:
- Last modified:
Description
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).
Frequently asked questions
- What is CVE-2020-12517?
- 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).
- How severe is CVE-2020-12517?
- CVE-2020-12517 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2020-12517 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2020-12517?
- CVE-2020-12517 affects Phoenixcontact Plcnext Firmware. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2020-12517?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- When was CVE-2020-12517 published?
- CVE-2020-12517 was published on 2020-12-17 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:o:phoenixcontact:plcnext_firmware:*:*:*:*:long_term_support:*:*:*
More vulnerabilities in Phoenixcontact Plcnext Firmware
- CVE-2020-12519 — High (CVSS 8.8): On Phoenix Contact PLCnext Control Devices versions before 2021.0 LTS an attacker can use this vulnerability i.e. to…
- CVE-2020-12521 — Medium (CVSS 6.5): On Phoenix Contact PLCnext Control Devices versions before 2021.0 LTS a specially crafted LLDP packet may lead to a…
- CVE-2020-12518 — Medium (CVSS 5.5): On Phoenix Contact PLCnext Control Devices versions before 2021.0 LTS an attacker can use the knowledge gained by…
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