CVE-2026-116537

Link Library <= 7.10.0 - Unauthenticated Stored Cross-Site Scripting via 'link_description' Parameter

2026-11-06 21:53
Jacek Sowiński (dzaku)

Strategic Overview

Status
Patched in 7.10.1
Affected Plugin
Link Library
Affected Version
<= 7.10.0
CVSS
7.2High
Weakness type
CWE-79 · Improper Neutralization of Input During Web Page Generation
CVE
CVE-2026-116537
View all Link Library vulnerabilities

At a glance

CVE-2026-116537 is a high-severity Improper Neutralization of Input During Web Page Generation vulnerability in the Link Library WordPress plugin, affecting versions <= 7.10.0. It carries a CVSS score of 7.2 (reachable over the network; low attack complexity). Exploitation requires no authentication. The issue is fixed in version 7.10.1; sites on affected versions should update now. Disclosed November 2026, reported by Jacek Sowiński (dzaku).

Vulnerability Overview

The Link Library plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'link_description' parameter in all versions up to, and including, 7.10.0 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This exploit requires the site administrator to have enabled the non-default 'Convert [] to <> in Link Description and Notes' (use_html_tags) setting; when this option is off, the bracket-to-angle-bracket conversion never runs and the payload is never reconstructed into executable HTML.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no privileges on the target site, and no interaction from a victim user.

CWE-79: Improper Neutralization of Input During Web Page Generation

Link Library <= 7.10.0 carries this weakness at link_description, and reaching it takes no account at all. Cross-site scripting happens when input from a request is written into a page without being escaped for the context it lands in, so the browser parses attacker-supplied text as markup or script.

Injected script runs with the privileges of whoever views the affected page, which is how these flaws turn into administrator session theft, silent account creation or persistent backdoors in page content. For Link Library the fix is 7.10.1: builds <= 7.10.0 are affected, anything from 7.10.1 onward is not.

Remediation

Update to version 7.10.1, or a newer patched version

How does WordSec protect against this?

Requests carrying this pattern arrive without a session, so nothing upstream of the firewall gets a chance to reject them: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Link Library 7.10.1 closes this, and updating the plugin is the step that ends it.

  • Firewall
  • Login Security
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2026-116537https://www.wordfence.com/threat-intel/vulnerabilities/id/2029ab3b-25e0-443c-936c-c5cfb44c32c8https://nvd.nist.gov/vuln/detail/CVE-2026-116537

Related records

Vulnerability data © Defiant, Inc., provided under the Wordfence Intelligence T&C