CVE-2025-8386 AVEVA Application Server IDE Basic Cross-site Scripting
An authenticated attacker can inject persistent XSS into help files, leading to privilege escalation for victims using the IDE.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2025-8386?
CVE-2025-8386 is a high-severity cross-site scripting vulnerability in AVEVA Application Server, published on 14 Nov 2025. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
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, can result in horizontal or vertical escalation of privileges. The vulnerability can only be exploited during config-time operations within the IDE component of Application Server. Run-time components and operations are not affected.
Weakness: CWE-80
Which versions are affected by CVE-2025-8386?
How do I fix CVE-2025-8386?
No fix has been published for CVE-2025-8386 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2025-8386 being exploited?
There is no known exploitation of CVE-2025-8386 in the wild and no public exploit code.
Sources
Also known as GHSA-jj42-75hx-q362.