The incoming-links plugin before 0.9.10b for WordPress has referrers.php XSS via the Referer HTTP header.
https://wpvulndb.com/vulnerabilities/8015
https://wordpress.org/plugins/incoming-links/#developers
https://plugins.trac.wordpress.org/changeset/1080044/incoming-links
Source: Mitre, NVD
Published: 2019-10-10
Updated: 2019-10-15
Base Score: 4.3
Vector: CVSS2#AV:N/AC:M/Au:N/C:N/I:P/A:N
Severity: Medium
Base Score: 6.1
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
EPSS: 0.00243