CVE-2019-16521 Cross-site scripting in n/a

What is CVE-2019-16521?

CVE-2019-16521 is a medium-severity cross-site scripting vulnerability in n/a, published on 16 Oct 2019. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

The broken-link-checker plugin through 1.11.8 for WordPress (aka Broken Link Checker) is susceptible to Reflected XSS due to improper encoding and insertion of an HTTP GET parameter into HTML. The filter function on the page listing all detected broken links can be exploited by providing an XSS payload in the s_filter GET parameter in a filter_id=search request. NOTE: this is an end-of-life product.

Weakness: CWE-79

Which versions are affected by CVE-2019-16521?

It affects 1 product.

Products include Managewp Broken Link Checker.

How do I fix CVE-2019-16521?

No fix has been published for CVE-2019-16521 yet. Limit exposure of the affected software until one is available.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2019-16521 being exploited?

There is no known exploitation of CVE-2019-16521 in the wild and no public exploit code.

Other vulnerabilities in n/a

• CVE-2023-23737 WordPress MainWP Broken Links Checker Extension Plugin <= 4.0 is vulnerable to SQL Injection Critical 9.3
• CVE-2022-2438 Broken Link Checker <= 1.11.16 - Authenticated (Admin+) PHAR Deserialization High 7.2
• CVE-2019-17207 Cross-site scripting in n/a Medium 5.4
• CVE-2022-3922 Broken Link Checker < 1.11.20 - Admin+ Cross-Site Scripting Medium 4.8
• CVE-2024-10903 Broken Link Checker < 2.4.2 - Admin+ SSRF Medium 4.7

Sources

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

Also known as GHSA-48cc-3r5m-2jp3.