# CVE-2025-62721: LinkAce: Authorization Bypass Allows Unauthorized Access to All Private Links, Lists, and Tags

> Authenticated users can access all private links, lists, and tags from other users due to missing authorization checks in RSS feed endpoints.

- **Severity:** High 7.1 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 4 Nov 2025
- **Updated:** 5 Nov 2025
- **Also known as:** GHSA-47g2-qw6q-cr96

## What is CVE-2025-62721?

CVE-2025-62721 is a high-severity missing authorization vulnerability in Kovah LinkAce, published on 4 Nov 2025. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

LinkAce is a self-hosted archive to collect website links. In versions 2.3.1 and below, authenticated RSS feed endpoints in the FeedController class fail to implement proper authorization checks, allowing any authenticated user to access all links, lists, and tags from all users in the system, regardless of their ownership or visibility settings. This issue is fixed in version 2.4.0.

Weakness: CWE-284 (Improper Access Control), CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor)

## Which versions are affected by CVE-2025-62721?

It affects 1 product.


Products: Linkace Linkace.

## How do I fix CVE-2025-62721?

No fix has been published for CVE-2025-62721 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-62721 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-62721 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-2025-62721 and fix it if it is affected.

What it is: CVE-2025-62721 is a high-severity missing authorization vulnerability in Kovah LinkAce, published on 4 Nov 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-62721 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-2025-62721/ (Markdown: https://insights.sbomify.com/CVE-2025-62721/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-62721
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-62721
- OSV: https://osv.dev/vulnerability/CVE-2025-62721

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-62721/
Summaries are generated and may contain mistakes; the official description above is the record.