CVE-2025-62719: linkace SSRF — Exploit & Fix

Description

LinkAce is a self-hosted archive to collect website links. In versions 2.3.0 and below, the htmlKeywordsFromUrl function in the FetchController class accepts user-provided URLs and makes HTTP requests to them without validating that the destination is not an internal or private network resource. This Server-Side Request Forgery (SSRF) vulnerability allows authenticated attackers to use the application server to perform port scanning and service discovery on internal networks. Practical impact is very limited because the function only extracts content from HTML meta keywords tags, which prevents meaningful data exfiltration from databases, APIs, or cloud metadata endpoints. This issue is fixed in version 2.4.0.

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CVSS v3.1 Score

4.3

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Weakness Type (CWE)

CWE-918 Server-Side Request Forgery (SSRF)

Affected Products

Vendor	Product	Versions
linkace	linkace	< 2.4.0

References

Advisories & Patches

https://github.com/Kovah/LinkAce/commit/4e0b822163ccefc2640c283ae969a39e673a0619 https://github.com/Kovah/LinkAce/security/advisories/GHSA-473x-rmm6-mc8c https://github.com/Kovah/LinkAce/security/advisories/GHSA-473x-rmm6-mc8c

Exploits

https://github.com/Kovah/LinkAce/security/advisories/GHSA-473x-rmm6-mc8c https://github.com/Kovah/LinkAce/security/advisories/GHSA-473x-rmm6-mc8c

Other References

http://github.com/Kovah/LinkAce/releases/tag/v2.4.0

Frequently Asked Questions

What is CVE-2025-62719? +

LinkAce is a self-hosted archive to collect website links. In versions 2.3.0 and below, the htmlKeywordsFromUrl function in the FetchController class accepts user-provided URLs and makes HTTP requests to them without validating that the destination is not an internal or private network resource. This Server-Side Request Forgery (SSRF) vulnerability allows authenticated attackers to use the application server to perform port scanning and service discovery on internal networks. Practical impact is very limited because the function only extracts content from HTML meta keywords tags, which prevents meaningful data exfiltration from databases, APIs, or cloud metadata endpoints. This issue is fixed in version 2.4.0. It has a CVSS v3.1 base score of 4.3 (MEDIUM).

How severe is CVE-2025-62719? +

CVE-2025-62719 has a CVSS v3.1 score of 4.3 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-62719? +

CVE-2025-62719 affects products from linkace, specifically: linkace. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-62719? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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