What’s Vulnerable › Vulnerabilities

CVE-2021-43549: OSIsoft PI Web API

• Severity: medium (CVSS 4.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-11-18 · updated 2026-06-17
• Weakness: CWE-79

Description

A remote authenticated attacker with write access to a PI Server could trick a user into interacting with a PI Web API endpoint and redirect them to a malicious website. As a result, a victim may disclose sensitive information to the attacker or be provided with false information.

Affected products

• OSIsoft PI Web API: through 2019

References

• https://us-cert.cisa.gov/ics/advisories/icsa-21-313-06
• https://us-cert.cisa.gov/ics/advisories/icsa-21-313-06

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