# CVE-2024-56508: File Upload Vulnerability Leading to XSS in LinkAce v1.15.5

> Attackers can upload malicious HTML files with JavaScript payloads via bookmark import, leading to XSS execution when accessed.

- **Severity:** High 7.6 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:H/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:** 27 Dec 2024
- **Updated:** 27 Dec 2024
- **Also known as:** GHSA-2wvv-4576-8862

## What is CVE-2024-56508?

CVE-2024-56508 is a high-severity vulnerability in Kovah LinkAce, published on 27 Dec 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

LinkAce is a self-hosted archive to collect links of your favorite websites. Prior to 1.15.6, a file upload vulnerability exists in the LinkAce. This issue occurs in the "Import Bookmarks" functionality, where malicious HTML files can be uploaded containing JavaScript payloads. These payloads execute when the uploaded links are accessed, leading to potential reflected or persistent XSS scenarios. This vulnerability is fixed in 1.15.6.

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

## Which versions are affected by CVE-2024-56508?

It affects 1 product.


Products: Linkace Linkace.

## How do I fix CVE-2024-56508?

No fix has been published for CVE-2024-56508 yet. Limit exposure of the affected software until one is available.

## Is CVE-2024-56508 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-56508 exists.

## Other vulnerabilities in Kovah LinkAce

- [CVE-2026-27458](https://insights.sbomify.com/CVE-2026-27458/): LinkAce: Stored XSS in Atom Feed via CDATA Escape in List Description (high 8.7)
- [CVE-2025-62722](https://insights.sbomify.com/CVE-2025-62722/): LinkAce: Stored XSS Vulnerability in Link Title Field Through Social Media Sharing Feature (high 8.7)
- [CVE-2026-33953](https://insights.sbomify.com/CVE-2026-33953/): LinkAce's SSRF protection can be bypassed via internal hostname resolution in LinkAce (high 8.5)
- [CVE-2025-53838](https://insights.sbomify.com/CVE-2025-53838/): LinkAce has a Stored One Click XSS vulnerability (high 8.4)
- [CVE-2026-30953](https://insights.sbomify.com/CVE-2026-30953/): LinkAce affected by SSRF via link creation: NoPrivateIpRule not applied to LinkStoreRequest (high 7.7)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-56508 and fix it if it is affected.

What it is: CVE-2024-56508 is a high-severity vulnerability in Kovah LinkAce, published on 27 Dec 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-2024-56508 exists.

Affected product: Kovah LinkAce. 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-2024-56508/ (Markdown: https://insights.sbomify.com/CVE-2024-56508/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-56508
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-56508
- OSV: https://osv.dev/vulnerability/CVE-2024-56508

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-56508/
Summaries are generated and may contain mistakes; the official description above is the record.