# CVE-2020-15781: Cross-site scripting in SICAM WEB firmware for SICAM A8000 RTUs

> An attacker can inject malicious scripts into log messages via the login screen, which execute when viewed by a victim in the web interface.

- **Severity:** Critical 9.6 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 14 Aug 2020
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-rx5g-mw23-2hw2

## What is CVE-2020-15781?

CVE-2020-15781 is a critical cross-site scripting vulnerability in Siemens AG SICAM WEB firmware for SICAM A8000 RTUs, published on 14 Aug 2020. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

A vulnerability has been identified in SICAM WEB firmware for SICAM A8000 RTUs (All versions < V05.30). The login screen does not sufficiently sanitize input, which enables an attacker to generate specially crafted log messages. If an unsuspecting victim views the log messages via the web browser, these log messages might be interpreted and executed as code by the web application. This Cross-Site-Scripting (XSS) vulnerability might compromize the confidentiality, integrity and availability of the web application.

Weakness: CWE-79 (Improper Neutralization of Input During Web Page Generation)

## Which versions are affected by CVE-2020-15781?

It affects 1 product.


Products: Siemens Sicam A8000 Firmware.

## How do I fix CVE-2020-15781?

No fix has been published for CVE-2020-15781 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-15781 being exploited?

There is no known exploitation of CVE-2020-15781 in the wild and no public exploit code.

## Other vulnerabilities in Siemens AG SICAM WEB firmware for SICAM A8000 RTUs

- [CVE-2024-34057](https://insights.sbomify.com/CVE-2024-34057/): Memory corruption in n/a (high 8.2)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-15781 and fix it if it is affected.

What it is: CVE-2020-15781 is a critical cross-site scripting vulnerability in Siemens AG SICAM WEB firmware for SICAM A8000 RTUs, published on 14 Aug 2020. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2020-15781 in the wild and no public exploit code.

Affected product: Siemens AG SICAM WEB firmware for SICAM A8000 RTUs. 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-2020-15781/ (Markdown: https://insights.sbomify.com/CVE-2020-15781/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-15781
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-15781
- OSV: https://osv.dev/vulnerability/CVE-2020-15781

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From sbomify Insights: https://insights.sbomify.com/CVE-2020-15781/
Summaries are generated and may contain mistakes; the official description above is the record.