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

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, CWE-200

Which versions are affected by CVE-2025-62721?

It affects 1 product.

Products include 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.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

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

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-47g2-qw6q-cr96.