SurfLink < 2.6.0 — Missing Authorization to Authenticated (Subscriber+) 410 Gone URL Import via 'surfl_import_410' AJAX Action

Am I affected?

• Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under SurfLink – Link Manager & Backup Restore.
• No admin access? Run a passive check of your site. It reads public files only.

What to do

1. Update to version 2.6.0, or a newer patched version
2. Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
3. Watch SurfLink – Link Manager & Backup Restore to get an email when the next vulnerability is published.

Advisory

Source description from Wordfence Intelligence, credited to Kazuma Matsumoto.

The SurfLink - Ultimate Link Manager plugin for WordPress is vulnerable to unauthorized data modification due to a missing capability check on the ajax_import_410() function in all versions up to 2.6.0. This is due to a missing capability check (current_user_can()) and missing nonce verification (check_ajax_referer()) in the ajax_import_410() function, while all other AJAX handlers in the same class (ajax_add_single_410, ajax_save_editted_410, ajax_delete_410, ajax_bulk_410_delete, ajax_empty_410, ajax_export_410) properly implement both authorization and nonce checks. This makes it possible for authenticated attackers, with Subscriber-level access and above, to import arbitrary URLs into the 410 Gone database table via the surfl_import_410 AJAX action. Injected URLs will cause the site to return HTTP 410 Gone responses to all visitors accessing those paths, potentially causing denial of service for legitimate pages and SEO damage through search engine delisting.

Exploits & references

Proof-of-concept & detection

No public proof-of-concept or detection template is known for this vulnerability.

Advisories & patches

• Advisorywordfence.com

Related CVEs

Timeline

1. Jul 10, 2026

   CVE published

   Severity medium, CVSS 4.3

2. Nov 13, 2026

   Record last updated