# CVE-2023-43988: Cross-site scripting in n/a

> Attackers can exploit a token leakage in the Nature Fitness LINE mini-app to send malicious notifications, potentially leading to code execution or account takeover.

- **Severity:** Medium 5.4 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 24 Jan 2024
- **Updated:** 11 Jun 2025
- **Also known as:** GHSA-v7w7-wwgq-qmfw

## What is CVE-2023-43988?

CVE-2023-43988 is a medium-severity cross-site scripting vulnerability in Linecorp Line, published on 24 Jan 2024. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

### Official description

An issue in nature fitness saijo mini-app on Line v13.6.1 allows attackers to send crafted malicious notifications via leakage of the channel access token.

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

## Which versions are affected by CVE-2023-43988?

It affects 1 product.


Products: Linecorp Line.

## How do I fix CVE-2023-43988?

No fix has been published for CVE-2023-43988 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-43988 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-43988 exists.

## Other vulnerabilities in Linecorp Line

- [CVE-2023-45559](https://insights.sbomify.com/CVE-2023-45559/): Information disclosure in n/a (high 8.2)
- [CVE-2023-43305](https://insights.sbomify.com/CVE-2023-43305/): Information disclosure in n/a (high 8.2)
- [CVE-2023-43300](https://insights.sbomify.com/CVE-2023-43300/): Information disclosure in n/a (high 8.2)
- [CVE-2023-43301](https://insights.sbomify.com/CVE-2023-43301/): Code injection in n/a (high 8.2)
- [CVE-2023-43302](https://insights.sbomify.com/CVE-2023-43302/): Information disclosure in n/a (high 8.2)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-43988 and fix it if it is affected.

What it is: CVE-2023-43988 is a medium-severity cross-site scripting vulnerability in Linecorp Line, published on 24 Jan 2024. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-43988 exists.

Affected product: Linecorp Line. 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-2023-43988/ (Markdown: https://insights.sbomify.com/CVE-2023-43988/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-43988
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-43988
- OSV: https://osv.dev/vulnerability/CVE-2023-43988

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-43988/
Summaries are generated and may contain mistakes; the official description above is the record.