# CVE-2023-27520: Cross-site request forgery in SEIKO EPSON printers/network interface Web Config

> Remote attackers can hijack user sessions and modify printer settings via CSRF in Epson Web Config.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N`)
- **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:** 11 Apr 2023
- **Updated:** 10 Feb 2025
- **Also known as:** GHSA-rjmj-fvvx-96gg

## What is CVE-2023-27520?

CVE-2023-27520 is a medium-severity vulnerability in SEIKO EPSON printers/network interface Web Config, published on 11 Apr 2023. 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

Cross-site request forgery (CSRF) vulnerability in SEIKO EPSON printers/network interface Web Config allows a remote unauthenticated attacker to hijack the authentication and perform unintended operations by having a logged-in user view a malicious page. [Note] Web Config is the software that allows users to check the status and change the settings of SEIKO EPSON printers/network interface via a web browser. According to SEIKO EPSON CORPORATION, it is also called as Remote Manager in some products. Web Config is pre-installed in some printers/network interface provided by SEIKO EPSON CORPORATION. For the details of the affected product names/model numbers, refer to the information provided by the vendor.

Weakness: CWE-352 (Cross-Site Request Forgery)

## Which versions are affected by CVE-2023-27520?

It affects 120 products.


Products: Epson Esifnw1 Firmware, Epson Esnsb1 Firmware, Epson Esnsb2 Firmware, Epson Lp-8200c Firmware, Epson Lp-8500c Firmware, Epson Lp-8700ps3 Firmware, Epson Lp-9200b Firmware, Epson Lp-9200c Firmware, Epson Lp-9200ps2 Firmware, Epson Lp-9200ps3 Firmware, Epson Lp-9300 Firmware, Epson Lp-9600 Firmware, Epson Lp-9600s Firmware, Epson Lp-9800c Firmware, Epson Lp-S3000 Firmware, Epson Lp-S3000ps Firmware, Epson Lp-S3000r Firmware, Epson Lp-S3000z Firmware, Epson Lp-S300n Firmware, Epson Lp-S310n Firmware and 100 more.

## How do I fix CVE-2023-27520?

No fix has been published for CVE-2023-27520 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-27520 being exploited?

There is no known exploitation of CVE-2023-27520 in the wild and no public exploit code.

## Other vulnerabilities in SEIKO EPSON printers/network interface Web Config

- [CVE-2023-23572](https://insights.sbomify.com/CVE-2023-23572/): Cross-site scripting in SEIKO EPSON printers/network interface Web Config (medium 4.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-27520 and fix it if it is affected.

What it is: CVE-2023-27520 is a medium-severity vulnerability in SEIKO EPSON printers/network interface Web Config, published on 11 Apr 2023. 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-2023-27520 in the wild and no public exploit code.

Affected product: SEIKO EPSON printers/network interface Web Config. 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-2023-27520/ (Markdown: https://insights.sbomify.com/CVE-2023-27520/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-27520
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-27520
- OSV: https://osv.dev/vulnerability/CVE-2023-27520

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-27520/
Summaries are generated and may contain mistakes; the official description above is the record.