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Fencer Intel
medium 5.5

CVE-2025-4417 json

AVEVA PI Connector for CygNet Cross-site Scripting

published last yr. modified 4mo ago also EUVD-2025-18216

cvss
5.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 4%
public exploits
0
none known

Summary

A cross-site scripting vulnerability exists in AVEVA PI Connector for CygNet Versions 1.6.14 and prior that, if exploited, could allow an administrator miscreant with local access to the connector admin portal to persist arbitrary JavaScript code that will be executed by other users who visit affected pages.

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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-25-162-09 updated cvss 5.5

AVEVA PI Connector for CygNet

  • AVEVA PI Connector for CygNet <=1.6.14
    affected: vendor fix, mitigation “AVEVA further recommends users follow general defensive measures:” my.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

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
last yr.

Exploit prediction

0.16% chance of exploitation in the next 30 days, higher than 4% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:C/C:N/I:H/A:N
CNA 4.0 6.9 CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:P/VC:N/VI:H/VA:N/SC:H/SI:H/SA:N
CNA 4.0 6.9 CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:P/VC:N/VI:H/VA:N/SC:H/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Affected products

  • AVEVA PI Connector for CygNet

Classification

Weakness
  • CWE-79 Improper Neutralization of Input During Web Page Generation

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.