CVE-2019-16521

Public Exploit

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.

Category

6.1
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.27%
Third-Party Advisory openwall.com Third-Party Advisory github.com Third-Party Advisory wordpress.org Third-Party Advisory wpvulndb.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://wordpress.org/plugins/broken-link-checker/#developers third party advisory product
https://github.com/sbaresearch/advisories/tree/public/2019/SBA-ADV-20190913-02_WordPress_Plugin_Broken_Link_Checker third party advisory exploit
http://www.openwall.com/lists/oss-security/2019/10/16/3 mailing list exploit third party advisory
https://wpvulndb.com/vulnerabilities/9917 third party advisory

Frequently Asked Questions

What is the severity of CVE-2019-16521?
CVE-2019-16521 has been scored as a medium severity vulnerability.
How to fix CVE-2019-16521?
To fix CVE-2019-16521, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2019-16521 being actively exploited in the wild?
It is possible that CVE-2019-16521 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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