# CVE-2025-53891: TIME LINE has Improper File Validation in Upload Section

> Attackers can upload malicious or oversized files to the TIME LINE website, causing denial of service or potential code execution.

- **Severity:** Medium 4.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L`)
- **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:** 15 Jul 2025
- **Updated:** 15 Jul 2025

## What is CVE-2025-53891?

CVE-2025-53891 is a medium-severity vulnerability in TimeLineOfficial Time-Line-, published on 15 Jul 2025. 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

The timelineofficial/Time-Line- repository contains the source code for the TIME LINE website. A vulnerability was found in the TIME LINE website where uploaded files (instruction/message media) are not strictly validated for type and size. A user may upload renamed or oversized files that can disrupt performance or bypass restrictions. This could result in malicious file upload, denial of service, or client-side crashes. Version 1.0.5 contains a fix for the issue.

Weakness: CWE-434 (Unrestricted Upload of File with Dangerous Type)

## Which versions are affected by CVE-2025-53891?


## How do I fix CVE-2025-53891?

No fix has been published for CVE-2025-53891 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-53891 being exploited?

There is no known exploitation of CVE-2025-53891 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-53891 and fix it if it is affected.

What it is: CVE-2025-53891 is a medium-severity vulnerability in TimeLineOfficial Time-Line-, published on 15 Jul 2025. 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-2025-53891 in the wild and no public exploit code.

Affected product: TimeLineOfficial Time-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-2025-53891/ (Markdown: https://insights.sbomify.com/CVE-2025-53891/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-53891
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-53891
- OSV: https://osv.dev/vulnerability/CVE-2025-53891

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From sbomify Insights: https://insights.sbomify.com/CVE-2025-53891/
Summaries are generated and may contain mistakes; the official description above is the record.