What is CVE-2025-8386?

CVE-2025-8386 is a medium-severity vulnerability in Aveva Application Server, classified under Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS). CVSS score: 6.9/10. Published 2025-11-14.

How severe is CVE-2025-8386?

Medium severity. CVSS v3 base score is 6.9 out of 10.

XSS in Aveva Application Server

CVE-2025-8386

The vulnerability, if exploited, could allow an authenticated miscreant (with privilege of "aaConfigTools") to tamper with App Objects' help files and persist a cross-site scripting (XSS) injection that when executed by a victim user, c…

EPSS: 0.000 (3.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.9 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:C/C:H/I:L/A:L.

Affected products

Aveva Application Server — versions 0

Weakness classification (CWE)

CWE-80 — Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)

References

Frequently asked questions

What is CVE-2025-8386?: CVE-2025-8386 is a medium-severity vulnerability in Aveva Application Server, classified under Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS). CVSS score: 6.9/10. Published 2025-11-14.
How severe is CVE-2025-8386?: Medium severity. CVSS v3 base score is 6.9 out of 10.