# 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.

- **Severity:** High 7.2 (`CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:P/VC:H/VI:L/VA:L/SC:H/SI:H/SA:H`)
- **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 available:** No
- **Published:** 14 Nov 2025
- **Updated:** 17 Nov 2025
- **Also known as:** GHSA-jj42-75hx-q362

## 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 (Improper Neutralization of Script-Related HTML Tags in a Web Page)

## 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.

## Is CVE-2025-8386 being exploited?

There is no known exploitation of CVE-2025-8386 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-8386 and fix it if it is affected.

What it is: 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.
Exploitation: There is no known exploitation of CVE-2025-8386 in the wild and no public exploit code.

Affected product: AVEVA Application Server. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2025-8386/ (Markdown: https://insights.sbomify.com/CVE-2025-8386/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-8386
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-8386
- OSV: https://osv.dev/vulnerability/CVE-2025-8386

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-8386/
Summaries are generated and may contain mistakes; the official description above is the record.