CVE-2020-12021

9.0 criticalEPSS 1.6%

Critical (9.0) in osisoft pi web api. EPSS 1.6% chance of exploitation in the next 30 days.

In OSIsoft PI Web API 2019 Patch 1 (1.12.0.6346) and all previous versions, the affected product is vulnerable to a cross-site scripting attack, which may allow an attacker to remotely execute arbitrary code.

Severity

CVSS 3.1

9.0 critical

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H

EPSS: 1.6% chance of exploitation in the next 30 days; higher than 75% of CVEs (scores of 2026-10-31)
CWE: CWE-79
Published: 2020-06-23
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

osisoft:pi_web_api

References

https://www.us-cert.gov/ics/advisories/icsa-20-163-01
https://www.us-cert.gov/ics/advisories/icsa-20-163-01

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