The shibboleth_login_form function in shibboleth.php in the Shibboleth plugin before 1.8 for WordPress is prone to an XSS vulnerability due to improper use of add_query_arg().
https://wpvulndb.com/vulnerabilities/8901
https://github.com/michaelryanmcneill/shibboleth/commit/1d65ad6786282d23ba1865f56e2fd19188e7c26a
https://bugs.debian.org/874416
http://www.debian.org/security/2017/dsa-3973
Source: Mitre, NVD
Published: 2017-09-12
Updated: 2025-04-20
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: 0.00991