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 at…

published 2020-06-23 6y ago modified 2026-06-17 4mo ago also EUVD-2020-4337

cvss: 9.0; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.6%; EPSS 1.6% chance of exploitation in 30 days, percentile 75%
public exploits: 0; none known

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.

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-20-163-01 updated 2020-06-11 cvss 7.7

OSIsoft PI Web API 2019

OSIsoft LLC PI Web API 2019 <=1.12.0.6346
affected: vendor fix, mitigation “Avoid adding authentication type anonymous in PI Web API configuration settings to limit exposure to authenticated users only.” customers.osisoft.com

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

Exploit prediction

1.57% chance of exploitation in the next 30 days, higher than 75% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
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

n/a OSIsoft PI Web API 2019

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation

References

us-cert.gov /ics/advisories/icsa-20-163-01
third-party-advisory, us-government-resource

Sources

CVE List CVE-2020-12021
NVD CVE-2020-12021

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