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TI-2021-19439 Aliases CVE-2021-43549GHSA-pj89-mr75-5fmf

Cross-site scripting in OSIsoft PI Web API

Priority LOW 32CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
High
User interaction
Required
Attack complexity
Low
Impact type
Cross-site scripting
Confidentiality · integrity · availability
High · Low · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

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.

Why it matters now

EPSS 0.00711 53rd percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
OSIsoftPI Web APIAll versions – 2019 SPI—No fix listedCNA
  • PI Web API VendorOSIsoft Affected All versions – 2019 SPI Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:osisoft:pi_web_api:*:*:*:*:*:*:*:*up to 2019VulnerableOSIsoft
  • cpe:2.3:a:osisoft:pi_web_api:*:*:*:*:*:*:*:* Versions up to 2019 Vulnerable ·OSIsoft

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-43549
  2. 2026-10-03 Alias added: GHSA-pj89-mr75-5fmf

References

Advisory 1

  • TI-2018-05409 Access control flaw in OSIsoft PI Web API CVSS 3.0CRITICAL 9.8
  • TI-2020-09680 Cross-site scripting in OSIsoft PI Web API 2019 CVSS 3.1CRITICAL 9.0
  • TI-2017-05535 Cross-site request forgery in OSIsoft PI Web API 2017 CVSS 3.0HIGH 8.8
  • TI-2019-10148 Protection mechanism failure in OSIsoft PI Web API CVSS 3.1HIGH 8.8
  • TI-2017-03271 Sensitive information in log files in OSIsoft PI Coresight and PI Web API CVSS 3.0HIGH 7.8
  • TI-2019-10147 OSIsoft PI Web API 2018 and prior may allow disclosure of sensitive information. CVSS 3.0MEDIUM 6.5
See all 7 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences